#include <iostream>
#include <stdio.h>
using namespace std;
    int calc(float *num_1, float *num_2, char *b) {
            float result;
            if (*b == '/') {
                result = *num_1 / *num_2;
                cout << *num_1 << "/" << *num_2 << "=" << result << endl;
                return 0;
            }
            if (*b == '+') {
                result = *num_1 + *num_2;
                cout << *num_1 << "+" << *num_2 << "=" << result << endl;
                return 0;
            }
            if (*b == '*') {
                result = *num_1 * *num_2;
                cout << *num_1 << "*" << *num_2 << "=" << result << endl;
                return 0;
            }
            if (*b == '-') {
                result = *num_1 - *num_2;
                cout << *num_1 << "-" << *num_2 << "=" << result << endl;
                return 0;
            }
        }
int main(int argc, const char * argv[]) {
    float num_1;
    float num_2;
    char b;
        cin >> num_1;
        cin >> b;
        cin >> num_2;
        /if (((num_1 <= 0 || num_1 >= 0) && (num_2 <= 0 || num_2 >= 0) && (b == '+' || b == '*' || b == '%' || b == '-' || b == '/'))) {
        }
        else {
            cout << "You specified an incorrect action!" << endl;
        }
        if (b == '/' && num_2 == 0) {
            cout << "Error, can not divide by zero!" << endl;
        }
        else {
            calc(num_1, num_2, b);
        }
}