1. No digits of the multiplicand have been left unmultiplied, so the algorithm finishes, yielding the following equation as a result: Example of a multiplication algorithm for multiple-digit factors Let our objective be to find the product of two numbers, 789 and 345. First part, Starting with the ones-column, the product of 789 and 5 is 3945. Then the tens column. We are using the multiplier 4, which is in the tens digit. This means that we are using the multiplier 40, not 4. We must add a 0 at the end of the answer because of this. The product of 789 and 40 is 31560. Next, the hundreds-column. Since we are using the multiplier 3 and that is in the hundreds-digit, that means it is the multiplier 300, and so the product of 789 and 300 is 236700. Second part, Now we have all of our products. To find the total product of 789 and 345, we must find the sum of all of our products. The answer to the example is . Division In mathematics, especially in elementary arithmetic, division is an arithmetic operation which is the inverse of multiplication. Specifically, given a number a and a non-zero number b, if another number c times b equals a, that is: then a divided by b equals c. That is: For instance, since . In the above expression, a is called the dividend, b the divisor and c the quotient. Division by zero — where the divisor is zero — is said to be either meaningless or undefined in elementary arithmetic. Division notation Division is most often shown by placing the dividend over the divisor with a horizontal line, also called a vinculum, between them. For example, a divided by b is written as: This can be read verbally as "a divided by b" or "a over b". A way to express division all on one line is to write the dividend, then a slash, then the divisor, as follows: This is the usual way to specify division in most computer programming languages since it can easily be typed as a simple sequence of characters. A handwritten or typographical variation — which is halfway between these two forms — uses a solidus (fraction slash) but elevates the dividend and lowers the divisor, as follows: Any of these forms can be used to display a fraction. A common fraction is