Division Assignment (/=)
The /= operator used after the
LET keyword, assigns a variable by dividing the current variable value by a numeric
expression.
Syntax
variable /= expr
Important: 
This operator cannot be used as an element of an
expression, it is only allowed as assignment operator with the LET instruction.
Usage
The /= assignment operator divides the value of the left-hand variable by the
right-hand numeric expression, and assigns the result to the variable.
Example
MAIN
  DEFINE x INTEGER
  LET x = 500
  LET x /= 5
END MAIN