You were aware that Dr. Ratio was an expert in mathematics, which was why you turned to him on account of your grades having worsened recently.

Not surprisingly, he was as conceited as he was intelligent.

His hand moved swiftly across the surface of a piece of paper as he jotted down complex mathematical equations, explaining the steps to you from time to time.

After a while, Dr. Ratio put his pen away, staring at you expectantly.

"Well," he commenced impatiently. "Do you comprehend it now?"