Jia & 24 Game

Please enter 4 numbers (range from 1-13):

24 Game is a mathematical card game in which the object is to find a way to manipulate
four integers so that the end result is 24. Addition, subtraction, multiplication, or
division may be used to make four digits from 1 to 13 equal 24. For an example card with
the numbers 4,7,8,8, a possible solution is the following: (7-8/8)*4=24.