<human>:  Paul has 52 marbles. His friend gave him 28 marbles. Then, he lost 1/4 of his marbles. How many marbles does Paul have left?
<bot>: How many marbles does Paul have? ** Paul has a total of 52 + 28 = <<52+28=80>>80 marbles.
How many marbles did Paul lose? ** He lost 1/4 x 80 = <<80/4=20>>20 marbles.
How many marbles does Paul have left? ** Therefore, he has 80 - 20 = <<80-20=60>>60 marbles left.
#### 60