import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        abc158_b solver = new abc158_b();
        solver.solve(1, in, out);
        out.close();
    }

    static class abc158_b {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            long N = in.nextLong();
            long A = in.nextLong();
            long B = in.nextLong();

            long sum = A + B;
            long mul = (long) N / sum;
            long mod = N % sum;

            if (A >= mod) {
                out.println(mul * A + mod);
            } else {
                out.println((mul * A) + A);
            }
        }

    }
}
 import java.io.OutputStream; OutputStream java.io import java.io.IOException; IOException java.io import java.io.InputStream; InputStream java.io import java.io.PrintWriter; PrintWriter java.io import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        abc158_b solver = new abc158_b();
        solver.solve(1, in, out);
        out.close();
    }

    static class abc158_b {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            long N = in.nextLong();
            long A = in.nextLong();
            long B = in.nextLong();

            long sum = A + B;
            long mul = (long) N / sum;
            long mod = N % sum;

            if (A >= mod) {
                out.println(mul * A + mod);
            } else {
                out.println((mul * A) + A);
            }
        }

    }
} Main public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        abc158_b solver = new abc158_b();
        solver.solve(1, in, out);
        out.close();
    } main {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        abc158_b solver = new abc158_b();
        solver.solve(1, in, out);
        out.close();
    } InputStream inputStream = System.in; inputStream System.in System System.in OutputStream outputStream = System.out; outputStream System.out System System.out Scanner in = new Scanner(inputStream); in new Scanner(inputStream) PrintWriter out = new PrintWriter(outputStream); out new PrintWriter(outputStream) abc158_b solver = new abc158_b(); solver new abc158_b() solver.solve(1, in, out) solver.solve solver 1 in out out.close() out.close out String[] args args static class abc158_b {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            long N = in.nextLong();
            long A = in.nextLong();
            long B = in.nextLong();

            long sum = A + B;
            long mul = (long) N / sum;
            long mod = N % sum;

            if (A >= mod) {
                out.println(mul * A + mod);
            } else {
                out.println((mul * A) + A);
            }
        }

    } abc158_b public void solve(int testNumber, Scanner in, PrintWriter out) {
            long N = in.nextLong();
            long A = in.nextLong();
            long B = in.nextLong();

            long sum = A + B;
            long mul = (long) N / sum;
            long mod = N % sum;

            if (A >= mod) {
                out.println(mul * A + mod);
            } else {
                out.println((mul * A) + A);
            }
        } solve {
            long N = in.nextLong();
            long A = in.nextLong();
            long B = in.nextLong();

            long sum = A + B;
            long mul = (long) N / sum;
            long mod = N % sum;

            if (A >= mod) {
                out.println(mul * A + mod);
            } else {
                out.println((mul * A) + A);
            }
        } long N = in.nextLong(); N in.nextLong() in.nextLong in long A = in.nextLong(); A in.nextLong() in.nextLong in long B = in.nextLong(); B in.nextLong() in.nextLong in long sum = A + B; sum A + B A B long mul = (long) N / sum; mul (long) N / sum (long) N sum long mod = N % sum; mod N % sum N sum if (A >= mod) {
                out.println(mul * A + mod);
            } else {
                out.println((mul * A) + A);
            } A >= mod A mod {
                out.println(mul * A + mod);
            } out.println(mul * A + mod) out.println out mul * A + mod mul * A mul A mod {
                out.println((mul * A) + A);
            } out.println((mul * A) + A) out.println out (mul * A) + A (mul * A) mul A A int testNumber testNumber Scanner in in PrintWriter out out public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        abc158_b solver = new abc158_b();
        solver.solve(1, in, out);
        out.close();
    }

    static class abc158_b {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            long N = in.nextLong();
            long A = in.nextLong();
            long B = in.nextLong();

            long sum = A + B;
            long mul = (long) N / sum;
            long mod = N % sum;

            if (A >= mod) {
                out.println(mul * A + mod);
            } else {
                out.println((mul * A) + A);
            }
        }

    }
} public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        abc158_b solver = new abc158_b();
        solver.solve(1, in, out);
        out.close();
    }

    static class abc158_b {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            long N = in.nextLong();
            long A = in.nextLong();
            long B = in.nextLong();

            long sum = A + B;
            long mul = (long) N / sum;
            long mod = N % sum;

            if (A >= mod) {
                out.println(mul * A + mod);
            } else {
                out.println((mul * A) + A);
            }
        }

    }
} Main
import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Scanner;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        Scanner in = new Scanner(inputStream);
        PrintWriter out = new PrintWriter(outputStream);
        abc158_b solver = new abc158_b();
        solver.solve(1, in, out);
        out.close();
    }

    static class abc158_b {
        public void solve(int testNumber, Scanner in, PrintWriter out) {
            long N = in.nextLong();
            long A = in.nextLong();
            long B = in.nextLong();

            long sum = A + B;
            long mul = (long) N / sum;
            long mod = N % sum;

            if (A >= mod) {
                out.println(mul * A + mod);
            } else {
                out.println((mul * A) + A);
            }
        }

    }
}

