#include <bits/stdc++.h> using namespace std; int n; int ansa,ansb; long long a,b,x,ans; int main(){ cin>>a>>b; while(a){ int t1=a%10; a/=10; long long x=b; while(x){ int t2=x%10; x/=10; ans+=t1*t2; } } cout<<ans; }