#include<iostream>
#include<cmath>
#include<cstring>
using namespace std;
int as[700],bs[700],c[1400];
int main(){
	
	memset(as,0,sizeof(as));
	memset(bs,0,sizeof(bs));
	memset(c,0,sizeof(c));
	string s1,s2;
	cin>>s1;
	cin>>s2;
	int a1,a2;
	a1=s1.length();
	a2=s2.length();
	if(s1[0]=='0'||s2[0]=='0'){
		cout<<"0";
		return 0;
	}
	for(int i=0,s=a1-1;s>=0;s--,i++){
		as[i]=s1[s]-'0';
	}
	for(int i=0,s=a2-1;s>=0;s--,i++){
		bs[i]=s2[s]-'0';
	}
	int qw=0,i,we;
	for( i=0;i<=a1-1;i++){
		for(we=0;we<=a2-1;we++){
			qw=i+we;
		c[qw]+=as[i]*bs[we];
		if(c[qw]>=10)
		{
			c[qw+1]+=c[qw]/10;
			c[qw]%=10;
		}
	}}
if(c[qw]>0) qw++;
qw--;
while(c[qw]==0&&qw>0) qw--;
	for(;qw>=0;qw--){
		cout<<c[qw];
	}
	
	return 0;
}