#Regular division = / (returns a float, even if its a whole number)

# calories = (age * 0.757 + weight * 0.03295 + HeartRate * 1.0781 - 75.4991) * time / 8.368 

#Write a program using inputs age(years), weight (pounds), heart rate(beats per minute), and time(minutes), respectively. 

# Output the average calories burned for a person 

#Output each floating-point value with two digits after the decimal point which can achieved as follows: 

#print(f"Calories: {calories:.2f} calories")

age = int(input())

weight = int(input())

heartrate = int(input())

time = int(input())

calories = ((age * 0.2757) + (weight* 0.03295) + (heartrate * 1.0781) - 75.4991) * time / 8.368 

print(f"Calories: {calories:.2f} calories")