Quadrivium Miscellany with Rithmomachia

...5 if it is a four quaternarius; the number four, 6 if it is a six senarius; the number six, 7 if it is a seven, 4 if it is a five, 8 if it is an eight, 9 if it is a nine, 10 when [dealing with] any of these parts toward the denomination In medieval abacus texts, "denomination" refers to the digit being placed in the quotient or result row. according to the location of the greatest divisor—whether it be in the second, third, fifth, or sixth [line]. By that [denomination], you will multiply all the differences of the divisors individually viritim; one by one or separately. Likewise, whatever results from this multiplication, you will add to the remaining dividends. Taking the proper greatest part from both and reducing it to the denomination to, you will multiply the difference by it.

And you shall do the same the same thing for as long as you are able to place the proper part of the dividend through the proper lines The vertical columns on the abacus board representing decimal places. without an obstacle occurring. Then, having removed namely the multiplication which multiplies out of all [parts] the differences [completed according] to these denominations for the time being, and you should bring these back to the greatest divisor as above, so that you may complete it for the time being the differences, you will compare the remainders with the divisors.

And if you see that the divisors contain a greater number of units, [and] the remainder is more than nine for the divisor that is. If it is equal, once the remainders have been removed, add a unit to the denominations above. If, however, the remainders maintain a greater number, again add a unit to the denominations and allow the number which was in excess of the divisors to remain. Thus, [you shall] diligently [consider] how much you have in the denominations...