#include<iostream>
using namespace std;
int main(){
double n, p, s, n1;
cin>> n >> p >> s;
n1 = (n +(n * p) / 100);
cout<< s / n1;
return 0;
}
I2luY2x1ZGU8aW9zdHJlYW0+CnVzaW5nIG5hbWVzcGFjZSBzdGQ7CgppbnQgbWFpbigpewogICAgZG91YmxlIG4sIHAsIHMsIG4xOwogICAgY2luPj4gbiA+PiBwID4+IHM7CiAgICBuMSA9IChuICsobiAqIHApIC8gMTAwKTsKICAgIGNvdXQ8PCBzIC8gbjE7CiAgICByZXR1cm4gMDsKfQ==