// No.552 十分簡単な星1の問題
package main

import (
	"fmt"
	"math/big"
)

func main() {
	var s string
	fmt.Scan(&s)

	i := new(big.Int)
	fmt.Sscan(s, i)
	j := big.NewInt(10)
	fmt.Println(i.Mul(i, j))
}