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

### Instruction:
Jack sews 3 shirts for each of his 3 kids. He sews 7 buttons in each shirt. How many buttons must Jack use for all the shirts?

### Response:
 Idadi ya mashati yote kwa watoto wake ni 3 * 3 = <<3*3=9>>9 mashati.
Idadi ya vitufe inayohitajika ni 7 * 9 = <<7*9=63>>63 vitufe.