I = Prt
I = Interest = 36736
P = Principal = 20,500
r = Intrest rate = 6.6% = 0.066
t = time
first we have to solve for t
I = Prt
t = I/Pr = 36736/(20,500)(0.066) = 36736/1353 = 27.15
So it would take 27.15 years to pay
The interest per year is when t = 1
I = Prt = (20,500)(0.066)(1) = 1353
So, each year the interest would be 1,353