#include<bits/stdc++.h>
using namespace std;
char a[100005],b[100005];
int arr[100005],brr[100005],crr[100005];
int main(){
    cin>>a+1>>b+1;
    if(a[1]=='0'||b[1]=='0'){
        cout<<0;
        return 0;
    }
	long long len1=strlen(a+1); 
	long long len2=strlen(b+1);
	long long len3=len1+len2-1;
	for(int i=1;i<=len1;i++)
		arr[i] = a[len1-i+1]-'0';
	for(int i=1;i<=len2;i++)
		brr[i] = b[len2-i+1]-'0';
	for(int i=1;i<=len1;i++)
	    for(int j=1;j<=len2;j++)
	        crr[i+j-1]+=arr[i]*brr[j];
    for(int i=1;i<=len3;i++)
        if(crr[i]>=10){
            crr[i+1]+=crr[i]/10;
            crr[i]%=10;
        }
    if(crr[len3+1])
        len3++;
    for(int i=len3;i>=1;i--)
        cout<<crr[i];
    return 0;
}