Experts pls help me-confusing remainder theorem

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I found this theorem while going through a book:

The remainder is the same for all the multiples of the divisor and to the specific factors of the divisor that are bigger than the remainder.
Examples given:
case 1:the remainder when 1057 divided by 1000 is 57
case 2:the remainder when 1057 divided by 10000 (which is multiple of 1000) is also 57
case 3:the remainder when 1057 divided by 1000n where n is any natural number will be 57
case 1:But as per the theorem remainder when 1057 divided by 10 (which is a factor of 1000 and which is less than 57) is not 57

Can someone validate this theorem.
Source: — Problem Solving |

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by Bill@VeritasPrep » Tue May 01, 2012 6:38 pm
When the divisor is bigger than the dividend, the quotient is 0 and the remainder is the dividend.

This means that 1057/10000 = 0 R 1057.
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