#include<stdio.h>

int main(void) {
     int a, b, op;

    scanf("%d %d %d", &a, &b, &op);

    switch (op) {
        case 1:
            printf("%d + %d = %d\n", a, b, a + b);
            break;
        case 2:
            printf("%d - %d = %d\n", a, b, a - b);
            break;
        case 3:
            printf("%d * %d = %d\n", a, b, a * b);
            break;
        case 4:
            printf("%d / %d = %d\n", a, b, a / b);
            break;
        default:
            printf("無効な演算です\n");
            break;
    }  
 return 0;
 }