Some of 'em numbers X85235

Statement

Write a funcion @multiply_some(n, a, b)@ that receives an integer $n$ and two integers $a,b$ such that $n < a \le b$ , and returns the product of the integers in $[a,b]$ that are multiples of $n$ .

Sample session

>>> multiply_some(2, 5, 10)
480
>>> multiply_some(3, 10, 20)
3240
>>> multiply_some(5, 54, 57)
55
>>> multiply_some(8, 19, 23)
1

Information

Author: ProAl
Language: English
Official solutions: Python
User solutions: Python