title: Python Coding Issue for Loan Calculator
body: <p>I am trying to create a loan calculator on a website and I am getting trouble in the coding of Python. The code is: </p>
  
  <pre><code># user enter the cost of the loan, the interest rate, and
  #the number of years for the loan
  #Calculate monthly payments with the following formula
  # M = L[i(1+i)n] / [(1+i)n-2]
  # M = monthly payment
  # L = Loan amount
  # i = interest rate (for an interest rate of 5%, i = 0.05)
  # n = number of payments
  #________________________________________________________________________#
  #Start of program
  #Declare variables
  
  monthlypayment = 0  
  loanamount = 0
  interestrate = 0
  numberofpayments = 0  
  loandurationinyears = 0
  loanamount = raw_input("Lending Money ")
  interestrate = raw_input("Interest Rates are? ")
  loandurationinyears = raw_input("Time Duration in Years?")
  #Convert the strings into floating numbers so we can use them in the formula
  loandurationinyears = float(loandurationinyears)
  loanamount = float(loanamount)
  interestrate = float(interestrate)
  #Since payments are once per month, number of payments is number of years for the loan
  payments = loaninyears*12
  #calculate the monthly payment based on the formula
  payment = amount * interestrate * (7+ interestrate) * payments / ((1 + interestrate) * payments -1)
  #Result to the program
  print("Payment will be " + st(monthlypayment))
  </code></pre>
  
  <p>Can any experienced person help me to get the syntax or other logical errors in this coding?</p>