diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java
index ab96d88..450705c 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Axel.java
@@ -11,10 +11,14 @@ import java.util.Scanner;
 public class Axel {
 
 	public static void main(String[] args) throws FileNotFoundException {
-		Spreadsheet spr = new Spreadsheet(20,10);
 		String cell, in;
+		int rows, cols;
 		Scanner kb = new Scanner(System.in);
-		
+		System.out.print("Rows:");
+		rows=Integer.parseInt(kb.nextLine());
+		System.out.print("Cols:");
+		cols=Integer.parseInt(kb.nextLine());
+		Spreadsheet spr=new Spreadsheet(rows,cols);
 		//spr.put("A3", "3");
 		//spr.put("A2", "1");
 		
diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
index f650f37..d1538e5 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
@@ -130,9 +130,13 @@ public class Spreadsheet {
 				result = "" + sum(formula.substring(6, 8), formula.substring(9, 12));
 			else 
 				result = "" + sum(formula.substring(6, 8), formula.substring(9, 11));
-		
 		else if (formula.startsWith("PRODUKT("))  // e.g. PRODUKT(A3:B9)
-			result = "TODO"; // TODO
+			if(formula.length()==16) 
+				result = "" + product(formula.substring(8, 11), formula.substring(12, 15));
+			else if(formula.length()==15) 
+				result = "" + product(formula.substring(8, 10), formula.substring(11, 14));
+			else 
+				result = "" + product(formula.substring(8, 10), formula.substring(11, 13));
 		else if (formula.startsWith("MITTELWERT("))  // e.g. MITTELWERT(A3:A5)
 			result = "TODO"; // TODO
 		else if (formula.startsWith("STABW("))  // e.g. STABW(C6:D8) -> Standardabweichung
@@ -180,6 +184,28 @@ public class Spreadsheet {
 		}
 		return sum;
 	}
+	private long product(String startCellName, String endCellName) {
+		int product=1;
+		int startCellRow;
+		int endCellRow;
+		if(startCellName.length()==3)
+			startCellRow=Integer.parseInt((startCellName.charAt(1)+"")+(startCellName.charAt(2)+""))-1;
+		else
+			startCellRow=startCellName.charAt(1)-'1';
+		if(endCellName.length()==3)
+			endCellRow=Integer.parseInt((endCellName.charAt(1)+"")+(endCellName.charAt(2)+""))-1;
+		else
+			endCellRow=endCellName.charAt(1)-'1';
+		for(int i=startCellName.charAt(0)-'A'; i<=endCellName.charAt(0)-'A'; i++) {
+			for(int j=startCellRow; j<=endCellRow; j++) {
+				if(cells[j][i].isEmpty()) {
+					return 0;
+				}
+				product=product*Integer.parseInt(cells[j][i].getValue());
+			}
+		}
+		return product;
+	}
 
 	/**
 	 * This method calculates the result of a "normal" algebraic expression. It only needs to support