The document describes a method for converting numbers to and from vinculum notation using number splitting. To convert 7329850 to vinculum notation: 1) Split the number into sections wherever a digit less than 6 is right of a digit greater than 5, 2) Convert each section separately, such as 7=10-3 and 3298=3300-2. This gives 07|3298|50. To convert back, split the vinculum number into sections after bar digits and subtract the bar numbers from the non-barred numbers in each section. So 13330250 is split into 13 3302 50 and subtracting the bars gives 07|3298|50 = 7329850.