REM Assign $FOO to 42
VAR $FOO = 42

REM The variable is now 42. 
REM Let’s add it by 1.
$FOO = ( $FOO + 1 )

REM The variable is now 43: the sum of 42 and 1. 
REM Let’s subtract it by 1.
$FOO = ( $FOO - 1 )

REM The variable is now 42 (again): 
REM the difference of 42 and 1. 
REM Let’s multiply it by 2.
$FOO = ( $FOO * 2 )

REM The variable is now 84: 
REM the product of 42 and 2.
REM Let’s divide it by 2.
$FOO = ( $FOO / 2 )

REM The variable is now 42 (again): 
REM the quotient of 82 and 2.
REM Let’s modulus it by 4.
$FOO = ( $FOO % 4 )

REM The variable is now 2: 
REM the signed remainder of 42 and 4.
REM Let’s raise it to the power of 6.
$FOO = ( $FOO ^ 6 )

REM Our variable is now 64: 
REM the exponent of 2 and 6.