Multiplication of Whole Numbers by Multiples of 10

Let's find the product 8 × 10.

To find the product, first, multiply the non-zero parts of the numbers.
 

Multiply:

 

8 × 1 = 8
 

Now add one zero at the end of the obtained result:
 

80
 

So, 8 × 10 = 80.
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Help

The correct answer is

Remember :

The smallest number is the one that comes first while counting.

Solution :

To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.

21,27,23

21 is the smallest number.