start:java8

com/study/demo/test2_2.java

@@ -0,0 +1,14 @@
+package com.study.demo;
+import java.util.Scanner;
+
+public class test5 {
+    public static void main(String[] args) {
+        Scanner scanner = new Scanner(System.in);
+        int a = scanner.nextInt();
+        int b = scanner.nextInt();
+        int c = scanner.nextInt();
+        double pi = 3.1415926535;
+        double area = a * b * c + a * c + (pi * c * c) / 4;
+        System.out.printf("%.3f\n", area / 10000);
+    }
+}