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, -42, 27, 50], [-26, -1, -24], [-17, 49, -12, -20, 21]]

[-1474200, -624, -4198320]