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.

[[20, -49], [24, -16, -38, 50], [-40, 37, -13], [-21, 45], [-17, 17, -5], [-2, 47, -16, -2, -17], [22, 37, -27, -31, 44], [-8, 28, 44, 21, 37]]
[20, 729600, -40, 0, 0, -64, 968, -9856]

[[15, -20, -29], [-28, -45, -10], [27, -43], [33, 32, 1, 38], [-14, 5, 19, -3], [31, -30, -28, 20], [-33, -48, 22, -30, -46]]
[-20, 280, 0, 1216, -14, 16800, -1457280]

[[-35, 14, -20], [10, -7, -42], [38, 2, 5], [-3, -38], [31, 46, 45], [-15, -47], [-14, 34], [50, 16, -43, -9, -29], [-42, -40, 31]]

[-280, -420, 76, -38, 46, 0, -476, 800, 1680]