The DNA/RNA copy number is calculated using the following formula:
\[ \text{DNA copies/µL} = \frac{C_{DNA} \times N_A}{l \times w_{bp}} \]
Where:
\( C_{DNA} \) = DNA concentration (ng/µL)
\( N_A \) = Avogadro's number (6.022 \times 10^{23} molecules/mol)
\( l \) = Length of the DNA/RNA fragment (bp)
\( w_{bp} \) = Weight of a base pair (660 g/mol)