Pls show Standard Form solution with steps. [I Like Mathematics]

I'll tell you the trick and you solve.

When you divide 10^x by 10^y the answer is 10^(x-y).

10^12 = 100* 10^11
100*10^11/(4*10^7)=
25*(10^11/10^7) =
25*(10^4)=25000

10^(12-7)÷ 4
10^5 ÷ 4
2.5 × 10^4
25,000