Please write in Python 3. It should match the examples exactly.

Write a program that ask the user to enter a number n and calculates the value of the sum i(n-1) i-0 Recall that notation expresses a summation of terms as i varies from 0 to n. For example, when n 3 3 7(73 . ) 0+2+2+0=4 = An example run of your program should look like: Enter n: 3 The sume is 4 Enter n: 8 The sume is 84