Need help using basic interger function

Question

I made a basic program to calculate the arrival of a trail, but the problem
is that when i get the result of sum6 it comes out as 13.833333333333333.
I just want to remove all the numbers after 13 for the printout answer?!?!!?!
I know i have to use the "int" function to do this, but where & what do i put
in my code to do that?
thanks!!!!
// DECLARE VARIABLES/DATA DICTIONARY
double num1,num2, num3, num4 ; // Given numbers
double sum1,sum2, sum3, sum4, sum5, sum6, sum7, sum8 ; // Intermediate, sum of num1, num2, and num3
// READ IN GIVENS
System.out.println ("Please enter hour value of start time: ");
num1 = ITI1120.readDouble( );
System.out.println ("Please enter minute value of start time: ");
num2 = ITI1120.readDouble( );
System.out.println ("Please enter the speed of train (in km per hour) : ");
num3 = ITI1120.readDouble( );
System.out.println ("Please enter travel distance (in km) : ");
num4 = ITI1120.readDouble( );
// BODY OF ALGORITHM
sum1 = num1 * 60;
sum2 = sum1 + num2;
sum3 = num3 / 60;
sum4 = num4 / sum3;
sum5 = sum2 + sum4;
sum6 = sum5 / 60;
sum7 = sum6 * 60;
// PRINT OUT RESULTS
System.out.println("The hour value of the arrival time is: " + sum6);

Answer 1

Which is easier to debug, your code with the generic variable names or this code:
    System.out.println ("Please enter hour value of start time: ");
    startHour = ITI1120.readDouble( );
    System.out.println ("Please enter minute value of start time: ");
    startMinutes = ITI1120.readDouble( );
    System.out.println ("Please enter the speed of train (in km per hour) : ");
    velocityKmPerHr = ITI1120.readDouble( );
    System.out.println ("Please enter travel distance (in km) : ");
    travelKm = ITI1120.readDouble( );
    startMinutesFromHours = startHour * MINUTES_PER_HOUR;
    totalMinutes = startMinutesFromHours + startMinutes;
    velocityKmPerMin = velocityKmPerHr / MINUTES_PER_HOUR;
    travelTimeMinutes = travelKm / velocityKmPerMin;
    arrivalTimeTotalMinutes = totalMinutes + travelTimeMinutes;
    arrivalTimeHours = (int)(arrivalTimeTotalMinutes / MINUTES_PER_HOUR);
    noIdeaWhyYoureCalculatingThis = arrivalTimeHours * MINUTES_PER_HOUR;?