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

### Instruction:
Robert had 25 balls. Tim gave him half of his 40 balls. How many balls does Robert have now?

### Response:
 Tim alimpa 1/2 * 40 mipira = <<1/2*40=20>>20 mipira Robert.
Robert sasa ana mpira 25 mipira + 20 mipira = <<25+20=45>>45.