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: [[-41, -26, 2, -21], [-2, 18, -3, 2, 8], [-12, -34, -4, 46, 45]]

SOLUTION: [-52, -576, -75072]

PROBLEM: [[-28, -28, 33], [-17, -37, -45, -5], [-14, -20], [-30, 16, -34, 7, 36], [-1, -21, -23, -50], [-24, 37], [14, -43, -49, 3, 8], [11, -14, 33, -6, 39], [-49, 49, 40, 1], [11, 7, -11], [41, -9], [-30, -6, 22, -3, 1]]

SOLUTION:
[784, 0, 280, 587520, -50, -24, 112, 84, 40, 0, 0, 3960]