Modifies the value stored in a variable by divinding
it by a given value.
Parameters:
symbol -
A symbol object identifying a variable in the current context. The
variable must contain a numeric value.
aValue -
A numeric object represeting the value that
symbol will be devided with.
Returns:
The new value of the variable.
Modifies the contents of the variable identifyed by
symbol by dividing the
value it contains with value.
The variable binded to symbol is expected to
contain a numeric object.
