<human>:  Andrew bought a big bag of balloons. The bag had 303 blue balloons and 453 purple balloons. If Andrew shares half of his balloons with his brother, how many balloons does he have left?
<bot>: How many balloons are in the bag? ** There are 303 + 453 = <<303+453=756>>756 balloons in the bag.
How many balloons does Andrew have left? ** Once Andrew gives half of his balloons to his brother he has 756/2=<<756/2=378>>378 balloons left.
#### 378