import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);

		int A=sc.nextInt();
		int B=sc.nextInt();
		int T=sc.nextInt();

		int ans=0;

		int t=0;

		while(true) {

			t+=A;
			if(T+0.5<=t) break;

			ans+=B;

		}

		System.out.println(ans);

		sc.close();

	}

} import java.util.Scanner; Scanner java.util public class Main {

	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);

		int A=sc.nextInt();
		int B=sc.nextInt();
		int T=sc.nextInt();

		int ans=0;

		int t=0;

		while(true) {

			t+=A;
			if(T+0.5<=t) break;

			ans+=B;

		}

		System.out.println(ans);

		sc.close();

	}

} Main public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);

		int A=sc.nextInt();
		int B=sc.nextInt();
		int T=sc.nextInt();

		int ans=0;

		int t=0;

		while(true) {

			t+=A;
			if(T+0.5<=t) break;

			ans+=B;

		}

		System.out.println(ans);

		sc.close();

	} main {

		Scanner sc=new Scanner(System.in);

		int A=sc.nextInt();
		int B=sc.nextInt();
		int T=sc.nextInt();

		int ans=0;

		int t=0;

		while(true) {

			t+=A;
			if(T+0.5<=t) break;

			ans+=B;

		}

		System.out.println(ans);

		sc.close();

	} Scanner sc=new Scanner(System.in); sc new Scanner(System.in) int A=sc.nextInt(); A sc.nextInt() sc.nextInt sc int B=sc.nextInt(); B sc.nextInt() sc.nextInt sc int T=sc.nextInt(); T sc.nextInt() sc.nextInt sc int ans=0; ans 0 int t=0; t 0 while(true) {

			t+=A;
			if(T+0.5<=t) break;

			ans+=B;

		} true {

			t+=A;
			if(T+0.5<=t) break;

			ans+=B;

		} t+=A t A if(T+0.5<=t) break; T+0.5<=t T+0.5 T 0.5 t break; ans+=B ans B System.out.println(ans) System.out.println System.out System System.out ans sc.close() sc.close sc String[] args args public class Main {

	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);

		int A=sc.nextInt();
		int B=sc.nextInt();
		int T=sc.nextInt();

		int ans=0;

		int t=0;

		while(true) {

			t+=A;
			if(T+0.5<=t) break;

			ans+=B;

		}

		System.out.println(ans);

		sc.close();

	}

} public class Main {

	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);

		int A=sc.nextInt();
		int B=sc.nextInt();
		int T=sc.nextInt();

		int ans=0;

		int t=0;

		while(true) {

			t+=A;
			if(T+0.5<=t) break;

			ans+=B;

		}

		System.out.println(ans);

		sc.close();

	}

} Main
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc=new Scanner(System.in);

		int A=sc.nextInt();
		int B=sc.nextInt();
		int T=sc.nextInt();

		int ans=0;

		int t=0;

		while(true) {

			t+=A;
			if(T+0.5<=t) break;

			ans+=B;

		}

		System.out.println(ans);

		sc.close();

	}

}
