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.

[[47, -21, -32, 29], [-13, 19, 2, 49], [-4, -36, -28, -9]]
[-32, 2, -4032]