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

### Instruction:
There are twice as many surfers on Malibu beach as in Santa Monica beach. If there are 20 surfers in Santa Monica, calculate the total number of surfers on the two beaches.

### Response:
 Ikiwa kuna wapiga mawimbi 20 huko Santa Monica, ufuo wa Malibu una mara mbili ya wapiga mawimbi kama huko Santa Monica, maana yake kuna wapiga mawimbi 2*20 = 40 huko Malibu.
Pamoja, mabwawa hayo mawili yana jumla ya wapiga mawimbi 40+20 = <<40+20=60>>60.