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

### Instruction:
Jodi and Vance are researching on a deserted island and have to stay on the island for a certain number of weeks to carry out their research. On their first expedition, they stayed for three weeks on the island. They spent two weeks more on the second expedition than they spent on their first expedition. They spent twice as many weeks on their last expedition as they spent on their second expedition. Calculate the total number of days they spent on the island on all the trips.

### Response:
 Ikiwa walikaa wiki mbili zaidi kwenye safari yao ya pili kuliko walivyokaa kwenye wiki ya kwanza, walikaa kwenye kisiwa kwa wiki 2+3 = <<2+3=5>>5.
Kwenye safari hizo mbili, walikaa kwenye kisiwa kwa jumla ya wiki 5+3 = <<5+3=8>>8.
Kwenye safari yao ya tatu, walikaa kwenye kisiwa kwa wiki mara mbili zaidi ya walivyokaa kwenye wiki ya pili, ambayo ni wiki 2*5 = <<10=10>>10.
Kwenye safari zote tatu, walikaa kwenye kisiwa kwa jumla ya wiki 10+8 = <<10+8=18>>18.
Kwa kuwa wiki ina siku saba, walikaa kwenye kisiwa kwa jumla ya siku 18*7 = <<18*7=126>>126.