/**　javaのプログラム　例題３　データの集計　*/
import java.io.*;
class r3t {
	public static void main (String[] args) throws IOException {
		BufferedReader in = 
		new BufferedReader (new InputStreamReader(System.in));
		double t,s,k,gokei; 
		gokei = 0;
		System.out.print("単価を入力: ");
		t = (new Double(in.readLine())).doubleValue();
		while ( t != 0 ) {
			System.out.print("数量を入力: ");
			s = (new Double(in.readLine())).doubleValue();
			k = t * s;
			System.out.println ("単価 " + t + " 数量 " + s + " 金額 " + k);
			System.out.println();
			gokei = gokei + k;
			System.out.print("単価を入力: ");
			t = (new Double(in.readLine())).doubleValue();
		}
		System.out.println();
		System.out.println("金額の合計 " + gokei);
		System.out.print("実行終了");
	}
}