A fraction is usually split into two parts: the first part is the number on top, called the numerator; and the second part is the number on the bottom, called the denominator. These are both separated by a line called the “divisor line”. We can use the division method help to solve this question: to get a decimal, simply divide the numerator 4478 by the denominator 78 (which you can enter in any calculator):
4478 (numerator) ÷ 78 (denominator) = 57.41
And finally, you get 57.41 as your answer when you convert 57 32/78 (or 4478/78) to a decimal.