Final answer:
Gary will receive $238.35 in interest after the three years.
Step-by-step explanation:
The formula to calculate simple interest is:
Interest = Principal x Rate x Time
In this case, Gary deposited $3,700 in an account that pays 2.15% simple interest for three years.
To find the interest he will receive, we plug in the values into our formula:
Interest = $3,700 x 0.0215 x 3 = $238.35
Therefore, Gary will receive $238.35 in interest after the three years.