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: [[7, -50, 4, -3, 50], [-23, -20, 30, -39]]

[210000, -538200]