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

### Instruction:
Alyssa and Chelsea jointly bought 40 candles to decorate their room. Alyssa used half of them, and Chelsea used 70% of the remaining candles. How many candles are there in the room now?

### Response:
 Alyssa alitumia nusu ya mishumaa, ambayo ni 1/2*40 = <<1/2*40=20>>20 mishumaa.
Idadi ya mishumaa iliyosalia ni 40-20 = <<40-20=20>>20.
Chelsea alitumia 70% ya mishumaa iliyosalia, jumla ya mishumaa 70/100*20 = <<70/100*20=14>>14.
Kuna mishumaa 20-14 = <<20-14=6>>6 katika chumba sasa.