Shortcut Assignment: += -= *= /=

A very common pattern is changing a variable based on its own current value:

score = 10
score = score + 5

Python has a shortcut for this: +=. It means "add this to what's already there":

score = 10
score += 5
print(score)

prints: 15. The same shortcut works for -=, *=, and /=.

Your turn: read a starting number into total. Use += to add 10 to it, then use *= to multiply it by 2. Print the final value.