#include <iostream>
using namespace std;
#define N 10000
int A[N],B[N];
int main(){
    int a,b,cnt1=0,cnt2=0,sum=0;
    scanf("%d%d",&a,&b);
    while(a>0){
        A[cnt1++]=a%10;
        a/=10;
    }
    while(b>0){
        B[cnt2++]=b%10;
        b/=10;
    }
    for(int i=0;i<cnt1;i++){
        for(int j=0;j<cnt2;j++){
            sum+=A[i]*B[j];
        }
    }
    printf("%d",sum);
    return 0;
}