Zn.kt

class Zn(private val modulus: Int) {
    fun int(x: Int): ZnInt = ZnInt(x % modulus)

    operator fun ZnInt.plus(rhs: ZnInt): ZnInt = int(this.value + rhs.value)
}

class ZnInt(val value: Int)

fun main(args: Array<String>) {
    val ring = Zn(92)
    ring.run {
        val x = int(62)
        val y = int(111)
        println(x + y)
    }
}