PHP Math functions for addition, subtraction, multipication & division

$a=5;
$b=6;
$c=$a+$b;
echo $c;

$a=8;
$b=10;
$c=$a-$b;
echo $c;

Multiplication

$a=3;
$b=14;
$c=$a*$b;
echo $c;// output 42

Division

$a=3;
$b=14;
$c=$a/$b;
echo $c; //Output  0.21428571428571