How does multiplication and division work ? What does the mnemonic mean? How do you do it? The more details, the better. I'm a beginner!

Bead calculation multiplication is currently mainly based on proficiency in the big nine nine table, the use of empty disk before multiplication to carry out calculations. For example, 67 * 8 =, first 6 multiplied by 8, the use of the table of the big nine nine, equal to 48, from the abacus to do a start dialing in 48, and then 7 multiplied by 8, equal to 56, from the abacus of the left two from the cumulative result of the results of the results equal to 536.

Bead calculations are more commonly used in division is the quotient of the method of division, and the principle of the written division is the same , usually in the abacus of the left three from the dial in the divisor, for example, 68 divided by two, 68 divided by two. The first thing to do is to dial in 68 from the abacus from the third gear, first with 6 divided by 2, because 6 is greater than 2, enough to divide, in the divisor of 6 in the intervals (the first left gear to dial in the quotient of 3) and in the divisor of 6 subtracted from 2 * 3 = 6. And then divide the divisor of 8 by 2, the intervals quotient of 4, from the divisor of the number to see the removal of the number of the product with the quotient. The remainder is equal to 0 and the division is complete. The result is equal to 34.