#include<stdio.h>
#include<string.h>
char x[1000005];
long a[1000005],lr1,n,i;
long long rez[1000010];
long long d;
void impart(long long x,long long lr)
{long long c=0;
 long long i;
 for(i=1;i<=lr;++i)
    if(c<x)
      {
       c=c*10+a[i];
       if(lr1)rez[++lr1]=0;
      }
       else
     {
       rez[++lr1]=c/x;
       c%=x;
       if(i<=lr)c=c*10+a[i];
      }
 if(c>=x)
   {
    rez[++lr1]=c/x;
    c%=x;
   }
}
void inmult(long long x)
{long long i,t=0;
 for(i=1;i<=lr1;++i)
    {
     rez[i]=rez[i]*x+t;
     t=rez[i]/10;
     rez[i]%=10;
    }
 while(t){rez[++lr1]=t%10;t/=10;}
}

int main()
{
 freopen("next.in","r",stdin);
 freopen("next.out","w",stdout);
 gets(x);
 n=strlen(x);
 for(i=1;i<=n;++i)
    a[i]=x[i-1]-'0';
 scanf("%lld",&d);
 impart(d,n);
 for(i=lr1;rez[i]==9;--i)rez[i]=0;
 ++rez[i];
 inmult(d);
 for(i=1;i<=lr1;++i)printf("%ld",rez[i]);
 printf("\n");
 return 0;
}