/** Convert rational to (rounded) integer, after multiplying by 10**k. */
public static IntNum toScaledInt(RatNum r, int k)
{
if (k != 0)
{
IntNum power = IntNum.power(IntNum.ten(), k < 0 ? -k : k);
IntNum num = r.numerator();
IntNum den = r.denominator();
if (k >= 0)
{
num = IntNum.times(num, power);
}
else
{
den = IntNum.times(den, power);
}
r = RatNum.make(num, den);
}
return(r.toExactInt(ROUND));
}