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**Decimal point position**:

**1**. When a decimal number is multiplied by \(10\), \(100\), \(1000\), \(10000\), we move the decimal point by \(1\), \(2\), \(3\) and \(4\) places respectively to the right side of the number.

**2**. When a decimal number is divided by \(10\), \(100\), \(1000\), \(10000\), we move the decimal point \(1\), \(2\), \(3\) and \(4\) places respectively to the left side of the number.

Example:

**1**. Multiply \(125.643\) by \(10\).

Number of zeroes in \(10\) is \(1\). So, move the decimal point by one place to the right.

\(125.643 \times 10 = 1256.43\)

**2**. Multiply \(125.643\) by \(100\).

Number of zeroes in \(100\) is \(2\). So, move the decimal point by two places to the right.

\(125.643 \times 100 = 12564.3\)

**3**. Divide \(125.643\) by \(10\).

Number of zeroes in \(10\) is \(1\). So, move the decimal point by one place to the left.

$\frac{125.643}{10}$ \(= 12.5643\)

**4**. Divide \(125.643\) by \(1000\).

Number of zeroes in \(1000\) is \(3\). So, move the decimal point by three places to the left.

$\frac{125.643}{1000}$ \(= 0.125643\)