Definition: In this task you will be given a list of lists, of numbers. For every inner list, you should multiply every number in that list and put the results in your answer. The output should be a list of numbers with the same length as the number of the lists in the input list.
Input: [[31, -12, -8, 3], [13, -49, -40, -1, 14], [-14, -25, -48], [-12, -21, 11, -49], [-16, 46, 17], [-31, 23, 4, 23, 35], [-42, -24, -16, -7, 22], [-8, -20], [-11, 34, -22, 12, 1], [23, 2, -13]]

[8928, -356720, -16800, -135828, -12512, -2295860, 2483712, 160, 98736, -598]