import java.util.*;
import java.math.*;
public class Main
{
    public static void main(String args[])
    {
        Scanner cin = new Scanner(System.in);
        BigInteger a, b,n,c,d;
        //以文件EOF结束
        //while (cin.hasNext())
        //{
            n = cin.nextBigInteger();
			a = cin.nextBigInteger();
            b = cin.nextBigInteger();
            //System.out.println(a.add(b)); //大整数加法
            //System.out.println(a.subtract(b)); //大整数减法
            //System.out.println(a.multiply(b)); //大整数乘法
            //System.out.println(a.divide(b)); //大整数除法(取整)
            //System.out.println(n.remainder(a)); //大整数取模
            c=n.remainder(a);
            d=n.divide(a.add(b));
            d=d.multiply(a);
			c=c.add(d);
			//大整数的比较
            //if( a.compareTo(b) == 0 ) System.out.println("a == b"); //大整数a==b
            //else if( a.compareTo(b) > 0 ) System.out.println("a > b"); //大整数a>b
            //else if( a.compareTo(b) < 0 ) System.out.println("a < b"); //大整数a<b
            //大整数绝对值
            
            System.out.println(c); //大整数a的绝对值
            //大整数的幂
            //int exponent=10;
            //System.out.println(a.pow(exponent)); //大整数a的exponent次幂
            //返回大整数十进制的字符串表示
           // System.out.println(a.toString());
            //返回大整数p进制的字符串表示
            //int p=8;
            //System.out.println(a.toString(p));
        //}
    }
}