Помогите (8*10^4)*(2.5*10^-7)

Question

Помогите (8*10^4)*(2.5*10^-7)

Answer 1

80000*0,00000025=0,02

Answer 2

(8.10ˇ4).(2,5.10ˇ-7)=8.2,5.10ˇ4.10ˇ-7=20.10ˇ(4-7)=
=20.10ˇ-3=2.10ˇ(1-3)=2.(10ˇ-2)=2/100=0,02

Comments

8*2,5= 20, а не 10...