create class Airplane with 3 attributs : name:String, nsit:Int, price:Double

class Airplane(val name:String, val nbsit:Int, val price:Double){
    override fun toString(): String {
        return "Airplane(name='$name', nbsit=$nbsit, price=$price)"
    }
}

fun main() {
    val airplane = Airplane("Boeing 747", 300, 14000.0)
    println(airplane)
}