<|system|>
In a particular right triangle, the two legs have lengths of 40 inches and 42 inches. What is the area of the triangle?</s>.
<|user|>
Can you answer based on context?
<|assistant|>
The area of a right triangle is half the product of the lengths of its legs. Thus, the area of the triangle is $$(1/2)(40)(42) = 840\text{ square inches}.$$