#include<stdio.h>
#include<math.h>
int main(){
    int a,b,c;
    scanf("%d\n%d\n%d",&a,&b,&c);
    if(0<=a<=1||0<=b<=1||)0<=c<=1){
        printf("Invalid input");
        
    }
    int res = a*b*c;
    printf("%d",res);
    return 0;
    
}