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: [[37, -11], [19, 35], [34, 29, -19, 23, 39], [-21, 4, 36], [-8, -16, -50]]

[-407, 665, -16804398, -3024, -6400]