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: [[-50, 42, -4, -15], [26, 45], [23, -7, -22, -31], [21, -31, 8], [-40, -40, -43]]

[-126000, 1170, -109802, -5208, -68800]