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.

[[-42, 37, -28, -22], [6, 49], [47, -41, 37, -46]]
[-25872, 6, -46]