#include <bits/stdc++.h>
using namespace std;
char a1[10001],b1[10001];
int a[10001],b[10001],i,x,len,j,c[10001];
int main(){
    cin>>a1>>b1;
    int lena=strlen(a1);
	int lenb=strlen(b1);
    for(i=1;i<=lena;i++){
    	a[i]=a1[lena-i]-'0';
	}
    for(i=1;i<=lenb;i++){
    	b[i]=b1[lenb-i]-'0';
	}
	for(i=1;i<=lenb;i++){
		for(j=1;j<=lena;j++){
			c[i+j-1]+=a[j]*b[i];
		}
	}
    for(i=1;i<lena+lenb;i++){
    	if(c[i]>9){
			c[i+1]+=c[i]/10;
			c[i]%=10;
		}
	}
	len=lena+lenb;
    while(c[len]==0&&len>1){
    	len--;	
	}
    for(i=len;i>=1;i--){
    	cout<<c[i];	
	}
    return 0;
}
yc:yuguo