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

### Instruction:
Aaron, Henry's brother, is 15 years old. Henry's sister is three times as old as Aaron. Henry is four times as old as his sister. What's the combined age of the siblings?

### Response:
 Ikiwa Aaron ana umri wa miaka 15, na dada yake ni mara tatu zaidi ya umri wake, basi dada yake ana umri wa 3 * 15 = <<15*3=45>>45 miaka.
Kwa kuwa Henry ni mara nne zaidi ya umri wa dada yake, basi ana umri wa 45 * 4 = <<45*4=180>>180 miaka.
Umri wa jumla wa ndugu hao watatu ni 45 + 180 + 15 = <<45+180+15=240>>240 miaka.