A=10^7 * 10^5 / 10^3 * 10^2
=10^12/10^5
=10^7
B=10^8 * 10^-2 / 10^4 * 10^-5
=10^6/10^-1
=10^5
C= 10^-1 * 10^9 / 10^4 * 10^-3
=10^8/10^1
=10^7
D=(10^3)^3 / 10^5 * 10^-3
=10^9/10^2
=10^7
E= (10^2)^6 / 10^-2 * 10^6
=10^12/10^4
=10^8
F=(10^5)^4 / 10^6 * 10^7
=10^20/10^13
=10^7