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

### Instruction:
Bo is learning words for the GRE.  He got 800 flashcards.  He knew 20% of the words on them.  He has 40 days to learn the rest.  How many words does he need to learn a day?

### Response:
 Anajua maneno 800*.2=<<800*.2=160>>160
Hivyo anahitaji kujifunza maneno 800-160=<<800-160=640>>640
Hii inamaanisha anahitaji kujifunza maneno 640/40=<<640/40=16>>16 kwa siku