View Compilation Error

0_0_25499767_22823.cpp: In function 'int main()':
0_0_25499767_22823.cpp:7:19: error: invalid operands of types 'long long int' and 'double' to binary 'operator%'
 #define mod (1e9+7)
                   ^
0_0_25499767_22823.cpp:40:44: note: in expansion of macro 'mod'
   printf("Case #%d: %I64d\n",cas++,k * m % mod);
                                            ^