View Compilation Error

0_0_30527481_5406.cpp: In function 'long long int cal(long long int, long long int)':
0_0_30527481_5406.cpp:46:19: error: expected primary-expression at end of input
         a = a * a %
                   ^
0_0_30527481_5406.cpp:46:19: error: expected '}' at end of input
0_0_30527481_5406.cpp:46:19: error: expected '}' at end of input