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

### Instruction:
Julia bought 3 packs of red balls, 10 packs of yellow balls, and 8 packs of green balls. There were 19 balls in each package. How many balls did Julie buy in all?

### Response:
 Jumla ya pakiti ni 3 + 10 + 8 = <<3+10+8=21>>21.
Julia alinunua mipira 19 * 21 = <<19*21=399>>399.