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

### Instruction:
Leah bought 3 boxes of birdseed. When she went to put them away, she discovered that she already had 5 boxes in the pantry. Her parrot eats 100 grams of seeds each week and her cockatiel eats 50 grams of seeds in a week. If each box of birdseed contains 225 grams, for how many weeks can she feed her birds without going back to the store?

### Response:
 Kwa wiki, ndege wake hula jumla ya gramu 100 + 50 = <<100+50=150>>150 za mbegu kila wiki.
Ikiwa kila sanduku lina gramu 225, basi kila sanduku litawalisha wanyama wake kwa 225/150 = <<225/150=1.5>>1.5 wiki.
Kwa kuwa ana masanduku 8, ndege wake watakuwa wamelishwa kwa wiki 8 * 1.5 = <<8*1.5=12>>12.