Definition: In this task you will be given a list, of lists, of integers. For every inner list contained in the input list, you should multiply every even number in that list. The output should be a list of integers with the same length as the number of lists in the input list. If there are no even numbers in an inner list you should output 0 for that list.
Input: [[12, -28, 0, 6], [17, 47], [35, 20, 16, 36, -9], [7, 46, -37]]
Output:
[0, 0, 11520, 46]