Division Help

Smart Contracts
1

Quick Question! Many thanks in advance.

why does the following give 7000000000000000000 and not 7704160246533127889 :

    uint a = 20000 
    int b = 259683854649
    answer = (a / (uint(b) / 10e8) * 10e18;
2

Solved it:

uint a = 20000 
uint b = uint(259683854649) / 1e8;
answer = ((a* 1e5 / b + 5) / 10) * 1e14;