In this task, you are given a list of integers you need to calculate and return the range of the integers which is the difference between maximum and minimum element in the list.
Q: [326, 343, 257, 330, 387, 478, 173, 157, 120, 449, 172, 29, 336, 495, 331, 440, 95, 57, 175, 70]
A: 
466