#include <stdio.h>

int main() {
 //실습//
   /* printf("5*3/2\n");
    printf("7*7*3.14\n");
    printf("4.5*4.5\n");*/

    //실습3//
   /* printf("%d\n",5+3);
    printf("%d\n",7*2-4);
    printf("%d\n",15/2);*/

    //실습4//
     /*printf("5+3=%d\n",5+3);
    printf("7*2-4의 결과는 %d 입니다.\n",7*2-4);
    printf("15 나누기 2의 결과는 %d 입니다.\n",15/2);*/

    /*printf("5단\n");
    printf("%dx%d=%d\n",5,1,5*1);
    printf("%dx%d=%d\n",5,2,5*2);
    printf("%dx%d=%d\n",5,3,5*3);
    printf("%dx%d=%d\n",5,4,5*4);
    printf("%dx%d=%d\n",5,5,5*5);
    printf("%dx%d=%d\n",5,6,5*6);
    printf("%dx%d=%d\n",5,7,5*7);
    printf("%dx%d=%d\n",5,8,5*8);
    printf("%dx%d=%d\n",5,9,5*9);*/

    printf("3단\n");
    printf("%dx%d=%d\n",3,1,3*1);
    printf("%dx%d=%d\n",3,2,3*2);
    printf("%dx%d=%d\n",3,3,3*3);
    printf("%dx%d=%d\n",3,4,3*4);
    printf("%dx%d=%d\n",3,5,3*5);
    printf("%dx%d=%d\n",3,6,3*6);
    printf("%dx%d=%d\n",3,7,3*7);
    printf("%dx%d=%d\n",3,8,3*8);
    printf("%dx%d=%d\n",3,9,3*9);

    
    
    
    return 0;
}