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

### Instruction:
Anna puts three slices of ham in each sandwich. If she has 31 slices of ham, how many more slices of ham does she need to make 50 ham sandwiches?

### Response:
 Anna anahitaji vipande 3 x 50 = <<3*50=150>>150 vya hamu ili kufanya sandwich 50.
Anna anahitaji vipande 150 - 31 = <<150-31=119>>119 vya hamu zaidi.