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

### Instruction:
Holden's current master bedroom is 309 sq ft and his master bath is 150 sq ft.  If he wants to add a home office/personal gym divided space that is twice as large as his bedroom and bathroom, how much sq ft will this new room have?

### Response:
 Chumba cha kulala: futi za mraba 309
Bafu: futi za mraba 150
309+150=<<309+150=459>>459 futi za mraba
Chumba kipya: 2*459=<<2*459=918>>918 futi za mraba