How does the *= operator work?
*= operator takes the value currently stored in the variable on the left and multiplies it by the value on the right, then stores the result back into that variable. It saves us from having to rewrite the name of the variable on the right side of the
=, like this:
my_var = 10 my_var *= 10 # 100 longer = 10 longer = longer * 10 # 100