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

### Instruction:
A group of 30 tourists sets out on a walking tour of the rainforest. Two tourists are eaten by anacondas, then half the remaining tourists try to pet poisonous dart frogs and get poisoned. If only 1/7 of the poisoned tourists recovered, how many tourists are left at the end of the tour?

### Response:
 Kwanza, idadi ya watalii waliosalia baada ya anaconda kuwala watalii 2 ni 30 - 2 = <<30-2=28>>28
Kisha 28 / 2 = <<28/2=14>>14 watalii wanapata sumu.
Idadi ya watalii waliosalia baada ya sumu ni 28 - 14 = <<28-14=14>>14
Idadi ya watalii waliopona kutoka kwenye sumu ni 14 / 7 = <<14/7=2>>2.
Jumla ya watalii mwishoni mwa ziara ni 14 + 2 = <<14+2=16>>16