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: [[2, -25, -49, 25, -50], [-2, 47], [43, 25, -19, 46], [-38, -31]]

[-3062500, -94, -939550, 1178]