さや香の見せ算をScala 3で実装したものです。
scala> import io.github.arthur1.misezan.mise
scala> 1 mise 1
val res0: BigDecimal = 0
scala> 1 mise 2
val res1: BigDecimal = 2
scala> 2 mise 5
val res2: BigDecimal = 1.1
scala> 1 mise 100
val res3: BigDecimal = 83
$ cat main.scala
//> using dep "io.github.arthur1::misezan-scala:0.1.0"
import io.github.arthur1.misezan.mise
@main def program =
println(2 mise 5) // 1.1
$ scala-cli main.scala
1.1