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: [[37, -14, -19, 49], [26, 46], [-19, 10, 21], [49, 39, -45, 49]]

[482258, 1196, -3990, -4213755]