Follow the steps to create the program: Simple interest=p*r*t Therefore, instead of taking variables as a, b or c. We can take p,r and t as variables to avoid future mistakes. So Step 1:             p=int(input("enter the principal"))             r=int(input("enter the rate"))             t=int(input("enter the time")) We have added the input statement and set up our main part of the program. You can write anything in the commas, because they are the words to display.And always keep in mind to end the statement with two close brackets. So Step 2:             Si=(p*r*t) ...Sorry rest