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.
Q: [[49, 8, -18, 38], [2, 9, 10, -50, 31], [-32, 8, 35, -32, 29], [-18, 49, 31], [-25, -50, -35, 50], [40, -27, -1], [-26, -21, -12, -5]]
A: 
[-5472, -1000, 8192, -18, -2500, 40, 312]