While converting to mole how did u get the no u used in dividing

For example, in , for Carbon (C):

$$\text{Moles of C} = \frac{\text{Mass of C}}{\text{Molar mass of C}}$$

The molar mass of Carbon is approximately $12.01\, \text{g/mol}$.
For Hydrogen (H), the molar mass is approximately $1.008\, \text{g/mol}$.
For Oxygen (O), the molar mass is approximately $16.00\, \text{g/mol}$.
For Nitrogen (N), the molar mass is approximately $14.01\, \text{g/mol}$.

These values are obtained from the periodic table.