Cameron has decided to diversify his investment in the following way: how much total interest will cameron earn on his investment at the end of 3 years?

The total interest that will Cameron earn will be equivalent  to the multiplication of his total account , the interest.rate, and total years of his investment

For example :
if Cameron has $3,000 in account earning with 2.7 % simple interest rate,

at the end of 3 years, his total interest would be :
 3 x 2.7 % x $ 3,000 = $243