Depends if it is compounding interest or not. But assuming it is:
$201 x .09 = 18.09 (interest) = $219.09 (year 1)
$219.09 x .09 = 19.72 (interest) = $238.81 (year 2)
$238.81 x .09 = 21.49 (interest) = $260.30 (year 3)
$260.30 x .09 = 23.43 (interest) = $283.73 (year 4)
