First, you would need to determine how many pounds are equivalent to 1 ton.
1 ton = 2,000 pounds
Now, all you would have to do is multiply both sides of the equal sign by the number of tons.
1 × 40 = 2,000 × 40
40 tons = 80,000 pounds
40 tons is equivalent to 80,000 pounds.
I hope this helps!