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

### Instruction:
 Mary anajenga mozaiki kwa ukuta wa kafeteria ya shule yake. Itakuwa na urefu wa futi 10 na upana wa futi 15. Kila kigae anachotumia kina ukubwa wa inchi 1 mraba. Atahitaji vigae vingapi?


### 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