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

### Instruction:
Jim has 2 rows of 4 trees to start.  When he turns 10 he decides to plant a new row of trees every year on his birthday.  On his 15th birthday after he doubles the number of trees he has.  How many trees does he have?

### Response:
 Alikuwa na miti 2*4=<<2*4=8>>8 mwanzoni.
Aliplanta miti kwa miaka 15-10=<<15-10=5>>5.
Hivyo alipanda miti 5*4=<<5*4=20>>20.
Hivyo alikuwa na miti 20+8=<<20+8=28>>28.
Baada ya kuiongeza mara mbili, alikuwa na miti 28*2=<<28*2=56>>56.