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: [[38, 34, -13, 21], [-28, 6], [49, 35, 39, -20, 19]]

[-352716, -168, -25416300]