#include<bits/stdc++.h>
using namespace std;

int main(){
    char a[1001],b[1001]; 
    int m;
    cin >> a >> b >> m;
    
    int la=strlen(a),lb=strlen(b);
    int a1[1001]={},b1[1001]={};
    for(int i=0;i<la;i++){
        a1[la-1-i]=a[i]-48;
    }
    for(int i=0;i<lb;i++){
        b1[lb-1-i]=b[i]-48; 
    }

    int c1[2001]={};
    int x=0; 
    for(int i=0;i<lb;i++){
        for(int j=0;j<la;j++){
            c1[j+i] += a1[j]*b1[i] + x;
            x = c1[j+i]/10;
            c1[j+i] %= 10;
        }
        c1[i+la] = x;
        x = 0;
    }

    int lc=la+lb-1;
    if(c1[lc]!=0){
        lc++;
    }

    int cnt = 0;
    for(int i = lc - 1; i >= 0; i--){
        if(c1[i] == m){
            cnt++;
        }
    }
    cout << cnt << endl;
    return 0;
}