program project1;
{$mode objfpc}{$H+}
uses
sysutils,
fpsTypes, fpspreadsheet, fpsopendocument;
var
WB : TsWorkbook;
WS : TsWorksheet;
begin
WB := TsWorkbook.Create;
WB.Options := WB.Options + [boCalcBeforeSaving, boAutoCalc];
WS := WB.AddWorksheet('test');
WS.WriteFormula(0, 0, '=-A2+A3');
WS.WriteNumber(1, 0, 5000000000);
WS.WriteNumber(2, 0, 10000000000);
writeln(WS.ReadFormula(0, 0));
writeln(WS.ReadAsText(0, 0));
writeln(WS.ReadAsText(1, 0));
writeln(WS.ReadAsText(2, 0));
WB.Free;
readln;
end.