Email Record: Aposmation,|| Operis Apo-||demici Sev Hodoeporici||, De varijs variorum Auctorum Pe-||regrinationibus totius|| Orbis|| Avctarivm.|| nempe Henrici Porsii I. C.|| Iter Bizantinum:|| Nathanis Chytraei|| Iter Dantiscanum:|| [et]|| Francisci Fabri|| Sabothvs, Sive|| Silesia.||

Please enter the correct solution to the following calculation in figures:

three plus seven =