Einstein, Where Are You?

It's all how you write things. I recently discovered that if one (well, me) does not write a math problem down in a formula, one can come up with really, really wrong results.

For example:

x = (6*6) + (12*3) + (3*3) + (3*3)

The correct answer is 90.

However, if one were to write it like this:

6*6
12*3
3*3
3*3

.. one may be tempted to add the columns and then multiply:

(6 + 12 + 3 + 3) * (6 + 3 + 3 + 3)

This is the exact reason that the square footage of my hallway is 90 and not 360.