How to calculate 82 multiplied by 81 using long multiplication

How to calculate 82 multiplied by 81

How to calculate 82 multiplied by 81 using long multiplication. Here is step-by-step how to calculate 82 times 81 using long multiplication:

Step 1: Setup
Set up your multiplication problem like this:

	8	2
x	8	1

Step 2: Multiply
2 x 1 = 2. Put 2 below the line and 0 as a reminder on top:

	0
	8	2
x	8	1
		2

Step 3: Multiply
1 x 8 = 8. Take 8 and add 0 from the previous step to get 8. Enter 8 at the bottom:

	8	2
x	8	1
	8	2

Step 4: Add 0
Enter a 0 at the bottom right as a place holder, because you now move over one digit:

	8	2
x	8	1
	8	2
+		0

Step 5: Multiply
8 x 2 = 16. Put 6 below the line and 1 as a reminder on top:

	1
	8	2
x	8	1
	8	2
+	6	0

Step 6: Multiply
8 x 8 = 64. Take 64 and add 1 from the previous step to get 65. Enter 65 at the bottom:

			8	2
x			8	1
			8	2
+	6	5	6	0

Step 7: Add to get answer
Add up the bottom two numbers (82 + 6560 = 6642) to get the answer:

			8	2
x			8	1
			8	2
+	6	5	6	0
=	6	6	4	2

The bottom line is the answer. Therefore, 82 times 81 equals:

6642

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How to calculate 83 multiplied by 81
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