How to calculate 21 multiplied by 12 using long multiplication

How to calculate 21 multiplied by 12

How to calculate 21 multiplied by 12 using long multiplication. Here is step-by-step how to calculate 21 times 12 using long multiplication:

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

	2	1
x	1	2

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

	0
	2	1
x	1	2
		2

Step 3: Multiply
2 x 2 = 4. Take 4 and add 0 from the previous step to get 4. Enter 4 at the bottom:

	2	1
x	1	2
	4	2

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

	2	1
x	1	2
	4	2
+		0

Step 5: Multiply
1 x 1 = 1. Put 1 below the line and 0 as a reminder on top:

	0
	2	1
x	1	2
	4	2
+	1	0

Step 6: Multiply
1 x 2 = 2. Take 2 and add 0 from the previous step to get 2. Enter 2 at the bottom:

		2	1
x		1	2
		4	2
+	2	1	0

Step 7: Add to get answer
Add up the bottom two numbers (42 + 210 = 252) to get the answer:

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

The bottom line is the answer. Therefore, 21 times 12 equals:

252

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How to calculate 22 multiplied by 12
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