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

### Instruction:
Devin teaches one math course per year. He taught Calculus for 4 years, Algebra for twice as many years, and Statistics for 5 times as long as he taught Algebra. How many years has Devin taught?

### 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