import java.util.*;
 
public class Main {
 
    public static void main(String[] args) {
        Scanner stdIn = new Scanner(System.in);
        long N = stdIn.nextLong();
        long A = stdIn.nextLong();
        long B = stdIn.nextLong();
        stdIn.close();
 
        long Count = 0;
 
        if (N % (A + B) > A) {
            Count = A * (N / (A + B)) + A;
        } else {
            Count = A * (N / (A + B)) + (N % (A + B));
        }
 
        System.out.println(Count);
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz