answer = input("Use feet or meters? (f/m) ")


# TODO:  Add metric support
length = float(input("Pool Length:  "))
depth = float(input("Pool Depth (average):  "))
width = float(input("Pool Width:  "))
volume = length * depth * width

# The simple way
# if answer == "m":

# More complicated, but recognizes M and Meters and meters
if "m" in answer.lower():
    # Make conversion
    # Convert volume in cubic meters to cubic feet
    volume = volume * 35.31

# If the answer was "f", there's nothing extra to do

# This part uses English units
gallons = volume * 7.4

elephants = gallons / 50
print("It would take " + str(elephants) + " to empty the swimming pool in a day")
print("Provided they drink all the water and spill none")