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: [[-21, -12, -13], [-37, -23, -6, -17], [14, -14], [23, 22, 34], [23, 15], [42, -42, 31, -50], [22, 44, -8, 13, -20]]

SOLUTION: [-12, -6, -196, 748, 0, 88200, 154880]

PROBLEM: [[-38, 48, 1], [-4, -35], [28, 26], [34, 38, -46, 23], [-3, -47, -1, 32, -41]]

SOLUTION: [-1824, -4, 728, -59432, 32]

PROBLEM: [[-37, -41, 17], [29, -44, 35, -34, -46], [26, 9, 28], [0, -16, 24, -18], [13, 18, 42], [29, -21, -27], [-10, -16, 12, -39, -22], [4, -3], [-29, -23]]

SOLUTION:
[0, -68816, 728, 0, 756, 0, -42240, 4, 0]