$70\cdot 60=4200\left[\text{bo}7\cdot 6=42,\text{więc}70\cdot 60=4200\right]$  

$2500\cdot 400=1000000\left[\text{bo}25\cdot 4=100,\text{więc}2500\cdot 400=1000000\right]$  

$5000\cdot 130=650000\left[\text{bo}5\cdot 13=65\text{więc}5000\cdot 130=650000\right]$  

$\frac{360\sout{00}}{9\sout{00}}=\frac{360}{9}=40\left[36:9=4\text{więc}360:9=40\right]$  

$\frac{54000\sout{000}}{6\sout{000}}=\frac{54000}{6}=9000\left[\text{bo}54:6=9\text{więc}54000:6=9000\right]$  

$\frac{4800\sout{00}}{16\sout{00}}=\frac{4800}{16}=300\left[\text{bo}48:16=3\text{więc}4800:16=300\right]$