PHP - Arithmetic operators

Are used to perform mathematical operations. the following are basic operations between the arithmetic operators:
addition
par1 + par2
Subtraction
par1 - par2
multiplication
par1 * par2
division
par1 / par2
modulo
par1 % par2
additive inverse
- expression

PHP

Other pieces of example codes:
$x * 2 / $y
($j + 8)
(10 - $j * 0.5)
$y = (double)$x / 0xa
(0xff % 50 % 10) % 2
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