#include<iostream>
#include<cstdio> 
using namespace std;
int main(){
	freopen("cowmult.in","r",stdin);  
	freopen("cowmult.out","w",stdout); 
	int a,b,c1,c2,d1=-1,d2=-1,e=0,f1=1,f2=1,ding2;
	cin>>a>>b;
	for(int i=1;;i=i*10)
	{
		c1=b/i;
		d1++;
		if(b/(i*10)<10) break;
	}
	for(int i=1;;i=i*10)
	{
		c2=a/i;
		d2++;
		if(a/(i*10)<10) break;
	}
	for(;d1>0;d1--)
	{
		f1=f1*10;
	
	}
	for(;d2>0;d2--)
	{
	
		f2=f2*10;
		ding2=f2;
	}
	for(int i=1;a/i>0;i=10*i,f1=f1/10)
	{
		for(;f2>0;f2=f2/10)
		{
		e=e+(a/f1-(a/(f1*10))*10)*(b/f2-(b/(f2*10))*10);
		if(f2/10==0)
		{
			f2=ding2;
			break;
		}
		}
		
	}
	
	cout<<e<<endl;
	return 0;
}