def amount_of_plastic(width_brick, height_brick, length_brick, number_of_bricks):
    """Given the dimensions of a brick (width, height, length in cm) and the number of bricks ordered, calculate how much plastic, in grams, is required (if a cubic centimetre weighs 7 grams)."""

    # INSERT YOUR CODE BELOW THIS LINE FOR CALCULATING THE
    # AMOUNT OF PLASTIC AND RETURNING THE RESULT (DO NOT CHANGE
    # THE HEADER OF THE FUNCTION WHICH HAS BEEN PROVIDED FOR YOU
    # ABOVE)


#calculate the volume of brick

length_brick = int(input('Please Enter the Length of a Brick: '))
width_brick = int(input('Please Enter the Width of a Brick: '))
height_brick = int(input('Please Enter the Height of a Brick: '))
number_of_bricks = int(input('Please Enter the Number of Bricks: '))
grams = 7

#calculate grams needed for ordered bricks

amount_of_plastic = (width_brick* height_brick* length_brick* number_of_bricks) * grams

print ('Amount of plastic need for you order is ', amount_of_plastic, 'grams.')


# DO NOT CHANGE THE CODE BELOW THIS LINE
# The code below automatically tests your function
# following the approach described in
# Block 2 Part 4 (Page 207 and further).
# Before making any changes to this file,
# when you run it, you will get an AssertionError.
# Once you have completed the file with correct
# code, the AssertionError should no longer appear and
# "tests passed" will appear in the shell.


def test_amount_of_plastic():
    """Test the amount_of_plastic() function."""
    # Test for brick with dimensions 0, 0, 0 and
    # order of 20 bricks
    assert amount_of_plastic(0, 0, 0, 20) == 0

    # Test for brick with dimensions 1, 1, 1 and
    # order of 0 bricks
    assert amount_of_plastic(1, 1, 1, 0) == 0

    # Test for brick with dimensions 1, 1, 1 and
    # order of 20 bricks
    assert amount_of_plastic(1, 1, 1, 20) == 140

    # Test for brick with dimensions 1, 2, 3 and
    # order of 100 bricks
    assert amount_of_plastic(1, 2, 3, 100) == 4200

    print ("tests passed")


test_amount_of_plastic()