#include<bits/stdc++.h>
using namespace std;
int main(){
	long long x,y,n,sum=0;
	cin>>x>>y>>n;
	sum+=n/x;
	sum+=n/y;
	for(long long i=x;i<=n;i+=x)
		for(long long j=y;j<=n;j+=y){
			if(i==j) sum--;
		}
	cout<<sum;
	return 0;
}