All multiples of 10 end in a zero besides the number zero. So 10, 20, 30 and so on....
108,662,340,319,129 that is the answer
Congruent sides pair with each other. AB is congruent to FG, so put FG (x) under or below 16 (it doesn't matter as long as FH is next to it). Cross multiply, then continue as if it's an equation. With that, you get the answer that x, or FG, equals 9 m.
12.5 correct me if I am wrong!