#fv_annuity.py
#Future value (FV) of an ordinary annuity

p = eval(input("Enter the periodic payment P: $"))
n = eval(input("Enter the number of payments per year n: "))
r = eval(input("Enter the interest rate r: %"))
r = r / 100   #convert to decimal equivalent
t = eval(input("Enter the time in years t: "))

fv = p*((1+r/n)**(n*t) - 1) / (r/n)

print("The future value of the annuity will be: $", round(fv,2))

#Tests:
# P=100 n=10 r=10 t=10  fv=17048.14
# p=100 n=1  r=5  t=6   fv=680.19
# p=100 n=12 r=5  t=20  fv=41103.36