@Override
  public Operand executeOperation(Stack<Expression> operands) throws ExpressionException {
    if (operands.size() < this.getCurrentOperands())
      throw new ExpressionException("Wrong number of given parameters");

    Apfloat value1 = Operand.extractNumber(operands.pop());

    return new Operand(new Apfloat(value1.intValue()));
  }