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You just multiply them one digit at a time. Let us say, you want to multiply 12 by 34. Of course, a calculator can do this for you very quickly, but let us say you would like to be able to do it by hand. We can break up the number 12 into a 2 and a 10. So, 2 x 34 is 68, that's easy. (Or if you like, you can do it as 2 x 30 = 60, and 2 x 4 = 8, and 60 + 8 = 68.) Then 10 x 34 = 340. Then add the two results, 340 + 68 = 408. Done.

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13y ago

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