Simple Bank Interest Calculator written in python3.11

def calculator ():
    loan_amount=float(input("What is the amount of the loan you want to take out :"))
    currency=input("What is your currency , please type in the symbol  £ , $ , €   :")
    intrest1= (int(input("Precentage of interest as a number:")))
    intrest_type=intrest1/100+1
    length= float(input("What is the length on the loan in years :"))
    intrestperannum=(loan_amount*intrest_type)-loan_amount
    extra=intrestperannum*length
    amount=intrestperannum*length+loan_amount
    roundedamount=round(amount, 2)
    roundedextra=round(extra, 2)
    print("Your amount for simple interest is ",currency, roundedamount," This means that you will be paying ",currency,roundedextra,"in interest rounded up to 2 digits:")
calculator()