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

### Instruction:
Jamestown has 20 theme parks. If Venice has 25 more theme parks than Jamestown, and Marina Del Ray has 50 more theme parks than Jamestown, calculate the number of theme parks present in the three towns.

### Response:
 Kwa kuwa Venice ina mbuga za mandhari 25 zaidi ya Jamestown, kuna jumla ya mbuga za mandhari 20+25 = <<20+25=45>>45 katika Venice.
Kwa kuwa Marina Del Ray ina mbuga za mandhari 50 zaidi ya Jamestown, ina jumla ya mbuga za mandhari 20+50 = <<20+50=70>>70.
Kwa ujumla, miji mitatu ina jumla ya mbuga za mandhari 20+45+70 = <<20+45+70=135>>135