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: [[49, 25], [2, -29], [-38, -43, 4], [-6, -21]]

[1225, -58, 6536, 126]