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: [[50, -14, -49], [38, 39, 25, 28, 11], [-15, 29, -37, -49], [1, -12, 45, -35]]

[34300, 11411400, -788655, 18900]