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: [[21, -19, -30, -31, 1], [30, 23, 38], [16, -39, 6, -32], [32, -5, -37, -13]]

[-371070, 26220, 119808, -76960]