<human>:  Robert had 25 balls. Tim gave him half of his 40 balls. How many balls does Robert have now?
<bot>: How many balls did Tim give to Robert? ** Tim gave 40 / 2 = <<40/2=20>>20 balls to Robert.
How many balls does Robert have now? ** Robert now has 25 + 20 = <<25+20=45>>45 balls.
#### 45