Zapiszemy podane liczby w systemie dziesiątkowym i odszukamy literę odpowiadającą danej liczbie:

$\underset{500}{\underbrace{\text{D}}}\underset{50}{\underbrace{\text{L}}}\underset{5}{\underbrace{\text{V}}}=500+50+5=555\to \text{Z}$

$\underset{200}{\underbrace{\text{CC}}}\underset{40}{\underbrace{\text{XL}}}\underset{5}{\underbrace{\text{V}}}=200+40+5=245\to \text{A}$

$\underset{20}{\underbrace{\text{XX}}}\underset{2}{\underbrace{\text{II}}}=20+2=22\to \text{C}$

$\underset{900}{\underbrace{\text{CM}}}\underset{90}{\underbrace{\text{XC}}}\underset{9}{\underbrace{\text{IX}}}=900+90+9=999\to \text{H}$

$\underset{40}{\underbrace{\text{XL}}}\underset{9}{\underbrace{\text{IX}}}=40+9=49\to \text{O}$

$\underset{70}{\underbrace{\text{LXX}}}\underset{9}{\underbrace{\text{IX}}}=70+9=79\to \text{W}$

$\underset{200}{\underbrace{\text{CC}}}\underset{40}{\underbrace{\text{XL}}}\underset{5}{\underbrace{\text{V}}}=200+40+5=245\to \text{A}$

$\underset{1000}{\underbrace{\text{M}}}\underset{200}{\underbrace{\text{CC}}}\underset{30}{\underbrace{\text{XXX}}}\underset{9}{\underbrace{\text{IX}}}=1000+200+30+9=1239\to \text{N}$

$\underset{90}{\underbrace{\text{XC}}}\underset{9}{\underbrace{\text{IX}}}=90+9=99\to \text{I}$

$\underset{2000}{\underbrace{\text{MM}}}\underset{800}{\underbrace{\text{DCCC}}}\underset{90}{\underbrace{\text{XC}}}\underset{9}{\underbrace{\text{IX}}}=2000+800+90+9=2899\to \text{E}$

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$\underset{2000}{\underbrace{\text{MM}}}\underset{90}{\underbrace{\text{XC}}}\underset{9}{\underbrace{\text{IX}}}=2000+90+9=2099\to \text{P}$

$\underset{2000}{\underbrace{\text{MM}}}\underset{500}{\underbrace{\text{D}}}\underset{4}{\underbrace{\text{IV}}}=2000+500+4=2504\to \text{R}$

$\underset{500}{\underbrace{\text{D}}}\underset{50}{\underbrace{\text{L}}}\underset{5}{\underbrace{\text{V}}}=500+50+5=555\to \text{Z}$

$\underset{20}{\underbrace{\text{XX}}}\underset{5}{\underbrace{\text{V}}}=20+5=25\to \text{Y}$

$\underset{700}{\underbrace{\text{DCC}}}\underset{30}{\underbrace{\text{XXX}}}\underset{4}{\underbrace{\text{IV}}}=700+30+4=734\to \text{S}$

$\underset{500}{\underbrace{\text{D}}}\underset{50}{\underbrace{\text{L}}}\underset{5}{\underbrace{\text{V}}}=500+50+5=555\to \text{Z}$

$\underset{1000}{\underbrace{\text{M}}}\underset{900}{\underbrace{\text{CM}}}\underset{5}{\underbrace{\text{V}}}=1000+900+5=1905\to \text{Ł}$

$\underset{40}{\underbrace{\text{XL}}}\underset{9}{\underbrace{\text{IX}}}=40+9=49\to \text{O}$

$\underset{8}{\underbrace{\text{VIII}}}=8\to \text{Sˊ}$

$\underset{20}{\underbrace{\text{XX}}}\underset{2}{\underbrace{\text{II}}}=20+2=22\to \text{C}$

$\underset{90}{\underbrace{\text{XC}}}\underset{9}{\underbrace{\text{IX}}}=90+9=99\to \text{I}$

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$\underset{1000}{\underbrace{\text{M}}}\underset{200}{\underbrace{\text{CC}}}\underset{30}{\underbrace{\text{XXX}}}\underset{9}{\underbrace{\text{IX}}}=1000+200+30+9=1239\to \text{N}$

$\underset{200}{\underbrace{\text{CC}}}\underset{40}{\underbrace{\text{XL}}}\underset{5}{\underbrace{\text{V}}}=200+40+5=245\to \text{A}$

$\underset{700}{\underbrace{\text{DCC}}}\underset{30}{\underbrace{\text{XXX}}}\underset{4}{\underbrace{\text{IV}}}=700+30+4=734\to \text{S}$

$\underset{500}{\underbrace{\text{D}}}\underset{50}{\underbrace{\text{L}}}\underset{5}{\underbrace{\text{V}}}=500+50+5=555\to \text{Z}$

$\underset{2000}{\underbrace{\text{MM}}}\underset{800}{\underbrace{\text{DCCC}}}\underset{90}{\underbrace{\text{XC}}}\underset{9}{\underbrace{\text{IX}}}=2000+800+90+9=2899\to \text{E}$

$\underset{9}{\underbrace{\text{IX}}}=9\to \text{J}$

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$\underset{2000}{\underbrace{\text{MM}}}\underset{90}{\underbrace{\text{XC}}}\underset{9}{\underbrace{\text{IX}}}=2000+90+9=2099\to \text{P}$

$\underset{300}{\underbrace{\text{CCC}}}\underset{40}{\underbrace{\text{XL}}}\underset{4}{\underbrace{\text{IV}}}=300+40+4=344\to \text{L}$

$\underset{200}{\underbrace{\text{CC}}}\underset{40}{\underbrace{\text{XL}}}\underset{5}{\underbrace{\text{V}}}=200+40+5=245\to \text{A}$

$\underset{1000}{\underbrace{\text{M}}}\underset{200}{\underbrace{\text{CC}}}\underset{30}{\underbrace{\text{XXX}}}\underset{9}{\underbrace{\text{IX}}}=1000+200+30+9=1239\to \text{N}$

$\underset{2000}{\underbrace{\text{MM}}}\underset{800}{\underbrace{\text{DCCC}}}\underset{90}{\underbrace{\text{XC}}}\underset{9}{\underbrace{\text{IX}}}=2000+800+90+9=2899\to \text{E}$

$\underset{2000}{\underbrace{\text{MM}}}\underset{700}{\underbrace{\text{DCC}}}\underset{50}{\underbrace{\text{L}}}\underset{2}{\underbrace{\text{II}}}=2000+700+50+2=2752\to \text{T}$

$\underset{20}{\underbrace{\text{XX}}}\underset{5}{\underbrace{\text{V}}}=20+5=25\to \text{Y}$

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Odczytujemy hasło:

"Zachowanie przyrody to zachowanie przyszłości naszej planety"