View Compilation Error

0_0_21468828_3291.cpp:36:13: error: expected unqualified-id before numeric constant
 #define mod 1e9 + 7
             ^
0_0_21468828_3291.cpp:40:11: note: in expansion of macro 'mod'
 const int mod = 1000000007;
           ^
0_0_21468828_3291.cpp: In function 'int main()':
0_0_21468828_3291.cpp:36:13: error: invalid operands of types 'LL {aka long long int}' and 'double' to binary 'operator%'
 #define mod 1e9 + 7
             ^
0_0_21468828_3291.cpp:96:39: note: in expansion of macro 'mod'
                     ans = ans * ans % mod;
                                       ^