diff --git a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
index a458548..9274d7c 100644
--- a/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
+++ b/Axel/src/de/hs_mannheim/informatik/spreadsheet/Spreadsheet.java
@@ -194,7 +194,7 @@ public class Spreadsheet {
 		String result = "";
 
 		if (formula.startsWith("SUMME("))  // e.g. SUMME(A3:A8)
-			result = "" + sum(formula.substring(6, 8), formula.substring(9, 11));  // TODO adapt to cells with two digits
+			result = "" + sum(formula.substring(6, 8), formula.substring(9, 11));  // adapt to cells with two digits
 		else if (formula.startsWith("PRODUKT("))  // e.g. PRODUKT(A3:B9)
 			result = "" + pro(formula.substring(8, 10), formula.substring(11, 13));
 		else if (formula.startsWith("MITTELWERT("))  // e.g. MITTELWERT(A3:A5)
@@ -292,15 +292,11 @@ public class Spreadsheet {
 		int endCellRow = getRow(endCellName);
 		int endCellCol = getCol(endCellName);
 
-		long res = 0;
+		long res = 1;
 
 		for (int i = startCellRow; i <= endCellRow; i++) {
 			for (int j = startCellCol; j <= endCellCol; j++) {
-				if (res == 0) {
-					res = Integer.parseInt(cells[i][j].getValue());
-				} else {
-					res = res * (Integer.parseInt(cells[i][j].getValue()));
-				}
+				res = res * (Integer.parseInt(cells[i][j].getValue()));
 			}
 		}
 
@@ -411,7 +407,7 @@ public class Spreadsheet {
 		while (m.find()) {        // m.find() must always be used before m.group()
 			String s = m.group();
 			if (!s.isEmpty()) {
-				System.out.println(s);
+				//System.out.println(s);
 				zaehler++;
 
 				switch (zaehler){