Corollary 4 Now let us calculate the exact value of the circumference ratio (π) again. With the continuous extension of π value (3.1415926...), the perimeter and diameter are divided into smaller parts, which are equivalent to the fact that we regard the perimeter and diameter as infinite accumulations divided into infinitesimal quantities. Therefore, here, we return to the most primitive problem in axiom 1 and 3, that is, the most basic concept.