(0.2)³×5^5÷125^-1
(0,5)³×2^5÷8^-1

0.2³ * 5^5 : 125^(-1)=0.2² * 5^5 * 125=(1/5)³ * 5^5 * 5³=(5^5 * 5³)/5³ =5^5=31250.5³ *2^5 :8^(-1)=(1/2)³ * 2^5 * 2³=2^5=32