//
//	Read a frac
//	p.89
//

import java.util.Scanner;
public class ReadFrac
{
	public static void main(String[] args)
	{
		Scanner input = new Scanner(System.in);
		Fraction x = getFrac();
		//x.writeOut();
		System.out.println();
		Fraction y = getFrac();
		//y.writeOut();
		System.out.println();
		System.out.print("Input an operator (+, -, *, /): ");
		String op = input.next();
		System.out.println();
		Fraction z = new Fraction();		// result

		if(op.equals("+"))	z = x.add(y);
		else if(op.equals("*")) z = x.mul(y);

		z.writeOut();
		System.out.println("\n\nDone.\n\n");
	}

	// p.89
	private static Fraction getFrac()
	{
		Scanner input = new Scanner(System.in);
		Fraction temp = new Fraction();

		System.out.print("Input a fraction: ");
		String str = input.next(); // "1/2"
		String[] parts = str.split("/", 2);

		int n = Integer.parseInt(parts[0]); // "1" -> 1
		int d = Integer.parseInt(parts[1]);

		temp.set(n, d);
		return temp;
	}
}