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

### Instruction:
 Bi. Young ananunua seti ya puzzle yenye vipande 300 kwa ajili ya watoto wake watatu. Anagawanya vipande sawa kwa watoto hao watatu. Reyn anaweza kuweka vipande 25 katika picha ya puzzle. Rhys anaweka mara mbili ya Reyn. Rory anaweka mara tatu ya Reyn. Jumla, vipande vingapi vya puzzle bado havijawekwa?


### Response:
 Reyn anaweka vipande 25.
Rhys anaweka vipande 2*25 = <<2*25=50>>50.
Rory anaweka vipande 3*25 = <<3*25=75>>75.
Watoto wote watatu wanaweka vipande 25+50+75 = <<25+50+75=150>>150.
Bado kuna vipande 300-150 = <<300-150=150>>150 ambavyo havijawekwa.