MATHEMATICAL WIZARD

In maths I must confess I was always weak
My cheeks the teacher would often tweak
Didnt understand how two minuses make a plus
But accepted this conclusion without a fuss
When I grew up I had great regard
For that little known mathematical wizard
Who often hides in your gastrointestinal tract
He doesnt know about addition or subtraction
But is a genius when it comes to multiplication
Guessed it? Can anyone in the class reply?
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It is Mr. Amoeba - he just DIVIDES to MULTIPLY !