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, -19, 0, 3], [44, -1, -10], [31, -15, -13]]
Output:
[0, -440, 0]