firstnumber = input("Please enter a number")
secondnumber = input("Please enter another number")
thirdnumber = input("Please enter another number")
fourthnumber = input("Please enter another number")

firstnumber = int(firstnumber)
secondnumber =int(secondnumber)
thirdnumber = int(thirdnumber)
fourthnumber = int(fourthnumber)

firstsecondsum = firstnumber + secondnumber
thirdfourthsum = thirdnumber + fourthnumber
division = firstsecondsum/thirdfourthsum
print(round(division, 2))