<|system|>
When Frederick was born, his grandparents gave him a gift of $\$2000$, which was invested at a simple interest rate of $5\%$ per year.  How much money will Frederick have when he can collect the money at the age of $18$?  (Assume no money is added to the account besides the interest.)</s>.
<|user|>
Can you answer based on context?
<|assistant|>
If the interest is simple, then Frederick's money grows by $\allowbreak .05(2000)=100$ dollars per year.  This means he gained $18\times100=\$1800$, so he has a total of $2000+1800=\$3800$.