#include <stdio.h>

int main() {
   //실습1//
   /* printf("5*3/2\n");
    printf("7*7*3.14\n"); 
    printf("4.5*4.5*4.5\n"); */
    //실습3//
    printf("%d\n",5+3);
    printf("%d\n",7*2-4);
    printf("%d\n",15/2);

    return 0;
}