File list (Check if you may need any files):
Calculator\.classpath
..........\.mymetadata
..........\.project
..........\.settings\.jsdtscope
..........\.........\org.eclipse.jdt.core.prefs
..........\.........\org.eclipse.wst.jsdt.ui.superType.container
..........\.........\org.eclipse.wst.jsdt.ui.superType.name
..........\src\cn\domain\Calculator.java
..........\...\..\......\Demo.java
..........\WebRoot\1.jsp
..........\.......\index.jsp
..........\.......\META-INF\MANIFEST.MF
..........\.......\WEB-INF\classes\cn\domain\Calculator.class
..........\.......\.......\.......\..\......\Demo.class
..........\.......\.......\web.xml
..........\.......\.......\classes\cn\domain
..........\.......\.......\.......\cn
..........\src\cn\domain
..........\WebRoot\WEB-INF\classes
..........\.......\.......\lib
..........\src\cn
..........\WebRoot\META-INF
..........\.......\WEB-INF
..........\.myeclipse
..........\.settings
..........\src
..........\WebRoot
Calculator