code: func DecimalDiv(from1, from2, to *MyDecimal, fracIncr int) error {
  	to.resultFrac = myMinInt8(from1.resultFrac+int8(fracIncr), MaxFraction)
  	return doDivMod(from1, from2, to, nil, fracIncr)
  }
docs: // DecimalDiv does division of two decimals.
  //
  // from1    - dividend
  // from2    - divisor
  // to       - quotient
  // fracIncr - increment of fraction