Convert speed unit

package Data_Types_and_Variables_Exercises;

import java.io.BufferedReader;
import java.io.Console;
import java.io.IOException;
import java.io.InputStreamReader;
import java.text.DecimalFormat;

import static java.lang.System.in;
import static java.lang.System.out;

public class Convert_Speed_Units {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        DecimalFormat df = new DecimalFormat("#.######");

        float distanceInMeters = Float.parseFloat(reader.readLine());
        float hours = Float.parseFloat(reader.readLine());
        float minutes = Float.parseFloat(reader.readLine());
        float seconds = Float.parseFloat(reader.readLine());

        float totalTimeInSeconds = (hours * 60.0f + minutes) * 60.0f + seconds;

        float speedMPSec = distanceInMeters / totalTimeInSeconds;
        System.out.println(df.format(speedMPSec));

        float distanceInKM = distanceInMeters / 1000.0f;
        float totalTimeInHours = totalTimeInSeconds / 3600.0f;
        float speedKPHours = distanceInKM / totalTimeInHours;
        System.out.println(df.format(speedKPHours));

        float distanceInMiles = distanceInMeters / 1609.0f;
        float speedInMilesPerHour = distanceInMiles / totalTimeInHours;
        System.out.println(df.format(speedInMilesPerHour));
    }
}