public override Numeric mulReversed(Numeric x)
{
if (!(x is RatNum))
{
throw new ArgumentException();
}
return(RatNum.times((RatNum)x, this));
}
public override Numeric mul(object y)
{
if (y is RatNum)
{
return(RatNum.times(this, (RatNum)y));
}
if (!(y is Numeric))
{
throw new ArgumentException();
}
return(((Numeric)y).mulReversed(this));
}