View Compilation Error

0_0_22998000_11173.cpp: In function 'int main()':
0_0_22998000_11173.cpp:25:37: error: invalid operands of types '__gnu_cxx::__promote_2<long long int, int, double, double>::__type {aka double}' and 'int' to binary 'operator%'
         ll ans = ((pow(m,k)-1)*n+k)%k;
                                     ^