How to pass a slice as a variadic input?

main.go

package main

import (
	"fmt"
)

func echo(strings []int) []interface{} {
	ids := []interface{}{}
	for _, s := range strings {
		ids = append(ids, s)
	}
	return ids
}

func vardic(val ...interface{}){
  fmt.Println(val)
}

func main() {
	i := []int{1,2,3}
	fmt.Println("Hello",i)
	vardic(echo(i)...)
}