What is 100 times 253?
The answer would be 25300. An easy trick to learn is to know that when you multiply by 10 or 100 or 1000 etc all you need to do is add the number of 0s with the given number. If you have for example 25.3 instead first instead of adding 0s, the point moves to the right by one, then when you have no number left add the additional 0s. Example 25.34 times 1000 would be 25340