Arithmetic Course/Number Operation/Division

Division
Division is a mathematical operation of adding two quantities which can be represented by
 * A / B

Operation

 * a / b = b / a
 * a / b / c = a / (b / c) = (a / b) / c

Rules
Any number divides zero is equal to Infinity
 * a / 0 = ∞

Any number divides to itself is equal to 1
 * a / a = 1

Any number divides to its negative is minus one
 * a / (-a) = -1