Python: I'm making a simple calculator for class. What's wrong with this code?

Question

My teacher requests me to make a calculator that can calculate a 15% tip on a submitted price. I followed an online tutorial for this python application. I made a simple addition, subtraction, multiplication, and division calculator for practice before I make what my teacher requires. In the YouTube video I followed the python application ran on his computer. I get a a "Invalid Syntax" error in the Python Shell. I'm using Python 3.3.0. Thank you.

EDIT: I followed a different tutorial figured out how to finish my project. The only problem I'm having is using both regular integers (1, 2, 3, 4, etc.) and float integers (4.36, 5.45, etc.).

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print("Welcome to the calculator!")

mealPrice = int(input("Enter your meal price:"))

asw = mealPrice * 0.15

print("The tip you owe is: ", asw)

Answer 1

because y is string

y = int(raw_input("Input second integer: "))