#include<iostream>
#include<cstdio>
#include<cstring>
using namespace std;
int main()
{
	char a[60000],b[60000],c[60000];
	cin>>a>>b;
	int s1=strlen(a),s2=strlen(b);
	int x[50000],y[50000];
	for(int i=1;i<=s1;++i){
		x[i]=a[s1-i]-'0';
	}
	for(int j=1;j<=s2;++j){
		y[j]=b[s2-j]-'0';
	}
	int sum=s1+s2;
	for(int i=1;i<=s1;++i){
		for(int j=1;j<=s2;++j){
			c[i+j-1]+=x[i]*y[j];
		}
	}
	for(int i=1;i<=sum-1;++i){
		if(c[i]>9){
			c[i+1]+=c[i]/10;
			c[i]=c[i]%10;
		}
	}
	while(c[sum]==0&&sum>1)	sum--;
	for(int i=sum;i>=1;--i){
		printf("%d",c[i]);
	}
	return 0;
 }