The DECIMAL function converts  a  numeric  or  string  expression  to  the
  DECIMAL data type.

  Example

  A = DECIMAL ("3.20", 8, 2)

1  –  Syntax

      decimal-var = DECIMAL(exp [, int-const1, int-const2])

  Int-const1 specifies the total number of digits.   Int-const2  specifies
  the number of digits to the right of the decimal point.