MVLTIPLICATION.
FIrst, To Multiply any Number betwixt 30 and 100. In the two Numbers proposed you are to observe how many Vnites each of [ 40] them wants of 10; then (all your Fingers be∣ing open) lay down so many Fingers as the Numbers want of 10.
Note, All that stand up are Tens, those that are down Multiplied one by another are Vnites, which added to the Tens gives the Num∣ber, [ 50] or Product desi∣red, as in this Figure and Example, 6 times 8 is 48.
Place the Numbers one under the other, as in Addition, then Multiply the last Right-hand Fi∣gure of the Multiplicand by the same of the Multiplicator, and set the Product (if less than 10) under; but if greater, carry the Excess (that is, for every 10 one Vnite) to the next place: And if the Multiplicator have more places than one, [ 60] set down the first Figure of each respective Pro∣duct under that figure of the Multiplicator, by which it was made, and so on to the Left, ob∣serving ranks and files.
| CM. | XM. | M. | C. | X. | V. | |
| 4 | 2 | 6 | ||||
| 3 | 2 | 7 | ||||
| 1 | 4 | 2 | ||||
| 1. Product 2 | 1 | 4 | 0 | |||
| 3 | 2 | 8 | 0 | 0 | ||
| 4 | 1 | 2 | 0 | |||
| 2. Product 5 | 4 | 0 | 0 | |||
| 6 | 8 | 0 | 0 | 0 | ||
| 7 | 1 | 8 | 0 | 0 | ||
| 3. Product 8 | 6 | 0 | 0 | 0 | ||
| 9 | 1 | 2 | 0 | 0 | 0 | 0 |
| Total Sum | 1 | 3 | 9 | 3 | 2 | 2 |
| 426 | Multiplicand. |
| 327 | Multiplicator. |
| 2982 | First Product. |
| 852 | Second Product. |
| 1278 | Third Product. |
| 139332 | Sum of all the Products. |
The reason of which (as in the Table) is, that if all the particular Sums of the Products of the Multiplicand, arising from each Multiplicator be set down and added together, they will equal the Sum of all the Products taken together.
Example.
If a Souldier having Weekly 7 Shillings, how many Shillings must you have to pay 7693.
| 7693 | |
| 7 | |
| 53851 | Souldiers to Pay. |