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

### Instruction:
Traci and Harris are baking cakes together. Traci has brought flour from her own house and Harris has 400g of flour in his house. Each cake needs 100g of flour and Traci and Harris have created 9 cakes each. How much flour, in grams, did Traci bring from her own house?

### Response:
 Ili kupika keki, Traci na Harris walitumia jumla ya keki 9 * gramu 100 za unga kwa keki = <<9*100=900>>900g za unga.
Kwa hiyo, Traci alitumia gramu 900 za unga katika keki - gramu 400 za unga kutoka kwa unga wa Harris = 900g - 400g = <<900-400=500>>500g za unga ambazo Traci alileta kutoka nyumbani kwake.