View Compilation Error

0_0_1499065_7403.cpp: In function `long_int multiply_int(long_int&, int)':
0_0_1499065_7403.cpp:34: error: invalid operands of types `int' and `char[400]' to binary `operator*'
0_0_1499065_7403.cpp:35: error: incompatible types in assignment of `int' to `char[400]'