<human>:  Tom fills a 250 pound sandbag 80% full. But the filling material he is using is 40% heavier than sand. How much does the bag weigh?
<bot>: How much does the bag weigh when it is full of sand? ** The bag full of sand would weigh 250 * .8 = <<250*.8=200>>200 pounds
How much does the bag weigh when it is full of filling material? ** The filling material would make it 200 * .4 = <<200*.4=80>>80 pounds heavier
How much does the bag weigh? ** So it weighs 200 + 80 = <<200+80=280>>280 pounds
#### 280