Instructions: 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.
Input: [[-12, 24, 24, 5], [13, 30, 26, 23], [23, 20, 14, -49]]
Output:
[-6912, 780, 280]