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

### Instruction:
 Joe alicheza mpira na Derek na Tammy. Alikamata mpira mara 23. Derek alifanya mara nne chini ya mara mbili ya Joe. Tammy alikamata mpira mara 16 zaidi ya theluthi ya mara Derek. Tammy alikamata mpira mara ngapi?


### Response:
 Derek alikamata mpira mara 2 * 23 - 4 = 46 - 4 = <<2*23-4=42>>42.
Tammy alikamata mpira mara 42 / 3 + 16 = 14 + 16 = 30.