如何去掉excel cell右下角的黑色箭头?

I have a file with Excel 97-2003 (.xls) version. When this file is opened in Excel 2013, shows black arrowheads in right bottom corner of the cell. These arrows are only in cells B3:J3 and F4. All these cells contains integer numbers. To get an idea what I want to convey please have a look at following image.I have a file with Excel 97-2003 (.xls) version