#include<bits/stdc++.h>
using namespace std;
#define rep(i,x,y) for(int i=x;i<y;i++)
#define range(a) (a).begin(),(a).end()
#define print(A,n) rep(i,0,n){cout<<(i ? " ":"")<<A[i];}cout<<endl;
#define pprint(A,m,n) rep(j,0,m){print(A[j],n);}
const long mod=1e9+7;
const int size=1e5;
const long inf=1e9;
int main(){
	int A,B,C;cin>>A>>B>>C;
	cout.precision(10);
	cout<<fixed<<1.*A/B*C<<endl;
}
/*タスクを並列に行う 二分探索
x=(x ? true : false)
sorted
auto it=lower_bound(v.begin(),v.end(),w) v[it-v.begin()]>=w
auto it=upper_bound(v.begin(),v.end(),w) v[it-v.begin()]>w
void func(int* vec){}
puts(string) cout<<string<<endl;
1.*a/b int to double
(int)a-48 char to int
(char)(i+97) int to char
stoi(s) string to int
stoll(s)
cout.precision(16);
cout<<fixed<<a;
printf("%.6lf\n",a);
accumulate(a,a+n,0);
*/