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

### Instruction:
 Devin anafundisha kozi moja ya hesabu kwa mwaka. Ame fundisha Calculus kwa miaka 4, Algebra mara mbili ya miaka hiyo, na Statistics mara 5 ya muda wa Algebra. Devin amefundisha kwa miaka mingapi?


### Response:
 Calculus: <<4=4>>miaka 4
Algebra: 4(2)=miaka 8
Statistics: 8(5)=<<8*5=40>>miaka 40
Jumla ya miaka aliyofundisha: 4+8+40=<<4+8+40=52>>miaka 52