How to calculate 78 multiplied by 45 using long multiplication

How to calculate 78 multiplied by 45

How to calculate 78 multiplied by 45 using long multiplication. Here is step-by-step how to calculate 78 times 45 using long multiplication:

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

	7	8
x	4	5

Step 2: Multiply
8 x 5 = 40. Put 0 below the line and 4 as a reminder on top:

	4
	7	8
x	4	5
		0

Step 3: Multiply
5 x 7 = 35. Take 35 and add 4 from the previous step to get 39. Enter 39 at the bottom:

		7	8
x		4	5
	3	9	0

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

		7	8
x		4	5
	3	9	0
+			0

Step 5: Multiply
4 x 8 = 32. Put 2 below the line and 3 as a reminder on top:

		3
		7	8
x		4	5
	3	9	0
+		2	0

Step 6: Multiply
4 x 7 = 28. Take 28 and add 3 from the previous step to get 31. Enter 31 at the bottom:

			7	8
x			4	5
		3	9	0
+	3	1	2	0

Step 7: Add to get answer
Add up the bottom two numbers (390 + 3120 = 3510) to get the answer:

			7	8
x			4	5
		3	9	0
+	3	1	2	0
=	3	5	1	0

The bottom line is the answer. Therefore, 78 times 45 equals:

3510

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How to calculate 79 multiplied by 45
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