Given the task definition and input, reply with output. 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.

[[-4, 47, 50, 9], [-42, -22, 12], [21, 33], [16, 8, -21, 30, 46], [-28, -21, -7]]

[-200, 11088, 0, 176640, -28]