Wormm

package exams.retakeApril;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.math.BigDecimal;

public class P01_WormTest {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

        int wormLengthMeter = Integer.parseInt(reader.readLine());
        double wormWidthCm = Double.parseDouble(reader.readLine());

        int wormLengthCm = wormLengthMeter * 100;

        double reminder = wormLengthCm % wormWidthCm;

        if (reminder == 0) {
            //double product = wormLengthCm * wormWidthCm;
            BigDecimal product = (new BigDecimal(wormLengthCm)).multiply(new BigDecimal(wormWidthCm));
            System.out.printf("%.2f", product);
        } else {
            double percent = (wormLengthCm / wormWidthCm) * 100.0;

            System.out.printf("%.2f%%", percent);
        }
    }
}