Rationale

class Rational(var numerator: Int = 0, var denominator: Int = 1) {
    constructor(n: Long = 0L, d: Long = 0L) : this(n.toInt(), d.toInt())
    constructor(n: BigInteger = BigInteger.ZERO,
                d: BigInteger = BigInteger.ONE) : this(n.toInt(), d.toInt())
}

infix fun Int.divBy(d: Int): Rational {
    return Rational(this, d)
}

infix fun Long.divBy(d: Long): Rational {
    return Rational(this, d = d)
}

infix fun BigInteger.divBy(d: BigInteger): Rational {
    return Rational(this, d = d)
}

operator fun Rational.contains(range: IntRange): Boolean {
    return false
}

operator fun Rational.rangeTo(r: Rational): {
    return this..r
}

fun String.toRational(): Rational {
    return Rational(0, 1)
}