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 20 sandcastles on Mark's beach, each with 10 towers. On Jeff's beach, there are three times as many castles as on Mark's beach, each with 5 towers. What is the combined total number of sandcastles and towers on Mark's and Jeff's beaches?

### Response:
 Idadi ya minara kwenye ufuo wa Mark ni 20*10 = <<20*10=200>>200 minara.
Kuna ngome 20*3 = <<20*3=60>>60 kwenye ufuo wa Jeff, mara tatu ya idadi ya ngome kwenye ufuo wa Mark.
Idadi ya minara kwenye ufuo wa Jeff ni 60*5 = <<60*5=300>>300.
Kwa jumla, kuna minara 200+300 = <<200+300=500>>500 kwenye ufuo wa Mark na Jeff.
Kuna ngome 20+60 = <<20+60=80>>80 kwenye ufuo wa Mark na Jeff.
Jumla ya ngome na minara kwenye ufuo wao ni 80+500 = <<80+500=580>>580.