TASK DEFINITION: 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.
PROBLEM: [[-18, -5], [29, -9, -34], [4, 13], [-24, -27], [-43, -2]]

SOLUTION: [-18, -34, 4, -24, -2]

PROBLEM: [[-11, -21, 30, -14], [21, -38, -1, -39], [32, -23, -42], [31, 9, -13], [12, 49], [49, 44], [49, -21, 11, -5, 46], [-2, 35, 45, -19], [42, 15, -9, -4, 25], [-48, 2, 44, 7], [-4, -24, -35], [3, 29, 12], [27, 1, 20]]

SOLUTION: [-420, -38, -1344, 0, 12, 44, 46, -2, -168, -4224, 96, 12, 20]

PROBLEM: [[36, -25, 23, 40], [-47, 24, -6, 45], [36, 45, -24, -42, 23], [10, 47, -28]]

SOLUTION:
[1440, -144, 36288, -280]