import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); double K = in.nextDouble(); double C = K - 273.15; double F = C * 1.8 + 32; System.out.printf("%.9f%n", F); } }