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

### Instruction:
Mary is building a mosaic for her school cafeteria's wall. It will be 10 feet tall and 15 feet long. Each tile she uses is 1 inch square. How many tiles will she need?

### Response:
 Kwanza geuza urefu kuwa inchi: 15 futi * 12 inchi/futi = <<15*12=180>>180 inchi
Kisha geuza urefu kuwa inchi: 10 futi * 12 inchi/futi = <<10*12=120>>120 inchi
Kisha zidisha urefu na upana ili kupata eneo jumla la picha: 180 inchi * 120 inchi = <<180*120=21600>>21600 inchi mraba
Kisha gawanya eneo hilo na eneo la kila kigae ili kupata idadi ya vigae anavyohitaji: 21600 inchi mraba / 1 inchi mraba/kigae = <<21600/1=21600>>21600 vigae