Bug 205782 Excel can't process big data which type is Decimal.
engine/org.eclipse.birt.report.engine.emitter.prototype.excel/src/org/eclipse/birt/report/engine/emitter/excel/ExcelUtil.java
return (int) ( s * 10 / 2.54 * 72 );
			}
			else if ( size.endsWith( "pc" ) )
			{
				return s;
			}
			else
			{
				return s;
			}
		}
		catch ( Exception e )
		{
			e.printStackTrace( );
			return 0;
		}
	}
    public static boolean isNumber( String val )
	{
		NumberFormat nf = NumberFormat.getInstance( );
		try
		{
			Number num = nf.parse( val );
			return true;
		}
		catch ( Exception e )
		{
			return false;
		}
	}