Article: On a piece of paper, write the first double-digit number of the equation on top and the second number directly below it. Draw an equation line below the second number (you will write down the solution to the problem below this line later). For example, if you're using Vedic Math to multiply 20 x 21, write 20 on a piece of paper, then write 21 right below it. Draw the equation line just below the 21. If you're particularly adept at solving math problems in your mind, you can visualize this layout rather than writing it down. It can be helpful, though, to write out the equations when you are first starting out with Vedic multiplication. First, multiply the top left digit of the first number by the bottom left digit of the second number. Write your answer below the equation line, in the left-most column. This number is the first part of the solution. For example, when multiplying 20 x 21, first multiply the 2 (the first, left-side digit in 20) by 2 (the first, left-side digit in 21), which equals 4. Write the 4 below the equation line in the left column. First, multiply the top left column digit with the bottom right column digit. Then, multiply the bottom left column digit with the top right column digit. Add the solutions together and write the answer below the equation line to the right of the solution in the previous step. For example, when multiplying 20 x 21, first multiply the 2 (the top left column digit in the 20) by 1 (the bottom right column digit in 21), which equals 2. Then, multiply 2 (the bottom left column digit in the 21) with 0 (the top right column digit in the 20), which equals 0. Add the solutions, which are 2 and 0, together, which equals 2. Write the 2 below the equation line to the right of the 4 that you've already written below the equation line. Multiply the top digit in the right column by the digit at the bottom of the right column. Write the solution below the equation line in the right-most column. Then, read the number below the equation line left to right to get your final answer to the original equation. For example, when multiplying 20 x 21, multiply 0 (the top digit in the right column) by 1 (the bottom digit in the right column), which equals 0. Write 0 below the equation line to the right of the 4 and the 2 that you already have written down. Then, you can see that the answer to your original equation, 20 x 21, is 420.
What is a summary of what this article is about?
Write down your multiplication equation. Use traditional multiplication to multiply the numbers in the left column. Multiply the diagonal digits and add the solutions. Find the final answer by multiplying the digits in the right column.