#include<bits/stdc++.h> //#define int long long using namespace std; signed main(){ int a[5001],b[5001],c[5001],len1,len2,len3,i,j,x; char n1[5001],n2[5001]; memset(a,0,sizeof(a)); memset(b,0,sizeof(b)); memset(c,0,sizeof(c)); cin>>n1>>n2; len1=strlen(n1); len2=strlen(n2); for(int i=0;i<len1;i++){ a[len1-i]=n1[i]-48; } for(int i=0;i<len2;i++){ b[len2-i]=n2[i]-48; } for(i=1;i<=len1;i++){ x=0; for(j=1;j<=len2;j++){ c[i+j-1]=a[i]*b[j]+c[i+j-1]; x=c[i+j-1]/10; c[i+j-1]%=10; } c[i+len2]=x; } len3=len1+len2; while(c[len3]==0&&len3>1){ len3--; } for(i=len3;i>=1;i--){ cout<<c[i]; } return 0; }