Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Alex has 4 pens in the first week of a month. Every week her pen collection doubles. How many more pens will Alex have than Jane if Jane will have 16 pens after a month?

### Response:
 Ikiwa Alex ana kalamu 4 katika wiki ya kwanza ya mwezi, atakuwa na kalamu 4*2=<<4*2=8>>8 katika wiki ya pili.
Baada ya mkusanyiko wake wa kalamu kuongezeka mara mbili katika wiki ya tatu, Alex atakuwa na kalamu 2*8 = 16.
Katika wiki ya mwisho ya mwezi, Alex atakuwa na kalamu 2*16 = <<2*16=32>>32 baada ya mkusanyiko wake wa kalamu.
Ikiwa Jane atakuwa na kalamu 16 baada ya mwezi, Alex atakuwa na kalamu 32 - 16 = <<32-16=16>>16 zaidi ya Jane.