You should try it with long names and without and let's see what is easy to understand.

e^pii = -1

or

theNatural....Constant... = theCircleConstant... theSqureRootOfMinusOne = minusOn

or maybe you replace One with theNeutralElementForMultiplication

but maybe someone is too lazy and you need to give a good clear name for what multiplication is,

Sorry, but I could not help it, I seen this kind of comments multiple time, some people want to jump to the middle or end of a book/course and skip the hard work.