Fast Way to Multiply Numbers ending in 0?

Is there any trick to quickly multiply numbers ending in 0 - like 280 x 20?

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  1. Multiply the counting numbers. Then add the same number of zeroes as there are in the problem.

    28 * 2 = 56

    280 * 20 - 5600

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    Ms. Sue
  2. Awesome! Thank you :)

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  3. You're welcome.

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    Ms. Sue

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