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: [[-26, -31, -21], [-37, 17, -31], [-31, 14, 41, 48, 49], [46, 8, -16]]

[-16926, 19499, -41851488, -5888]