activeSheet.addTable("Table1", 0, 0, 4, 3, GcSpread.Sheets.TableStyles.dark1());
activeSheet.getCell(0,0).text("Value1");
activeSheet.getCell(0,1).text("Value2");
activeSheet.getCell(0,2).text("Total");
activeSheet.getCell(1,0).text("1");
activeSheet.getCell(2,0).text("2");
activeSheet.getCell(3,0).text("3");
activeSheet.getCell(1,1).text("5");
activeSheet.getCell(2,1).text("5");
activeSheet.getCell(3,1).text("5");
activeSheet.findTableByName("Table1").setColumnDataFormula(2, "=[Value1]*[Value2]");