diff --git a/Readme.md b/Readme.md
index 44f56e1..1cc48b6 100644
--- a/Readme.md
+++ b/Readme.md
@@ -1,8 +1,63 @@
 # Calculator-Example
 
-This is a simple example of an calculator agent system using the [Agents Platform](https://git.chai.uni-hamburg.de/UMS-Agenten/Agenten-Plattform) and based on [Agent Template](https://git.chai.uni-hamburg.de/UMS-Agenten/Agent-Template).
+This is a simple example of an calculator "agent system" using the [Agents Platform](https://git.chai.uni-hamburg.de/UMS-Agenten/Agenten-Plattform) and based on [Agent Template](https://git.chai.uni-hamburg.de/UMS-Agenten/Agent-Template).
 
 Start by `docker compose up` and open web interface of management at <http://localhost:8080/>.
 
-## Riddle Example
+## Calculator 
 
+A riddle is a math expression, e.g., `x * y =` and the values of the variables `x` and `y` are defined via text files.
+For example a line `x = 12` in text file assigns the value to `12` to the variable `x`.
+
+For example, the result of a riddle `x * x =` would be `144` with the explanation `12 * 12 = 144`.
+
+## Riddle Example
+In this example the values of the variables are [`x = 10`](./data/share/example/x.txt), [`y = 15`](./data/share/example/y.txt), [`z = 20`](./data/share/example/z.txt), see the files in [`./data/share/example/`](./data/share/example/).
+
+1. You may send a riddle to the management using the web interface (<http://localhost:8080/app/new>) and press "Send Message"
+	![](./webinterface_new_riddle.png)
+2. The message to the management will look like:
+	```json
+	{
+	  "id": "test1",
+	  "sub_ids": [],
+	  "riddle": {
+	    "context": "",
+	    "question": "y + x =",
+	    "solutions_before": []
+	  },
+	  "solution": [],
+	  "data": [
+	    {
+	      "type": "text",
+	      "file_plain": "example/z.txt",
+	      "file_extracted": null
+	    },
+	    {
+	      "type": "text",
+	      "file_plain": "example/y.txt",
+	      "file_extracted": null
+	    }
+	  ],
+	  "status": {
+	    "extract": {
+	      "required": true,
+	      "finished": false
+	    },
+	    "solve": {
+	      "required": true,
+	      "finished": false
+	    },
+	    "validate": {
+	      "required": true,
+	      "finished": false
+	    },
+	    "trial": 0,
+	    "solved": false
+	  },
+	  "contacts": 0
+	}
+	```
+3. Message will be send between agents for solving the riddle.
+4. Result can be found in web interface (<http://localhost:8080/app/table>)
+	![](./webinterface_result.png)
\ No newline at end of file
diff --git a/src/extract/agent.py b/src/extract/agent.py
index ee27ec6..54b23db 100644
--- a/src/extract/agent.py
+++ b/src/extract/agent.py
@@ -21,11 +21,8 @@ class CalculatorExtractVariables(ExtractTextAgent):
 					variable, value = match.group(1), int(match.group(2))
 					
 					data.file_extracted = self.store_extracted(data, ExtractedData(
-						contents=[
-							ExtractedContent(type="variable", content=variable),
-							ExtractedContent(type="value", content=value)
-						]
-					))
+							other={"variable" : variable, "value" : value}
+		 				))
 		return data
 
 
diff --git a/webinterface_new_riddle.png b/webinterface_new_riddle.png
new file mode 100644
index 0000000..a990bbd
Binary files /dev/null and b/webinterface_new_riddle.png differ
diff --git a/webinterface_result.png b/webinterface_result.png
new file mode 100644
index 0000000..d7b099a
Binary files /dev/null and b/webinterface_result.png differ