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

### Instruction:
There are 3 ducks in a pond and they all eat some pieces of bread thrown in the water. One duck eats half of all the pieces of bread. Another duck eats only 13 pieces of the bread and the last duck eats 7 pieces of bread. There are 30 pieces of bread left in the water, how many total pieces of bread were thrown in the pond?

### Response:
 Kuna vipande 30+7+13=<<30+7+13=50>>50 vya mkate baada ya bata la kwanza kula.
Bata la kwanza lula nusu ya mkate wote hivyo 50*2=<<50*2=100>>100 vipande vya mkate vilirushwa katika bwawa.