The apprentice prepares $\mathrm{<mn>54</mn>}\mathrm{pieces}$ in a day. If the number of pieces he makes is less than the number of pieces the master makes by $\mathrm{<mn>1</mn>}\mathrm{pieces}$, it is equal to $\frac{\mathrm{<mn>9</mn>}}{\mathrm{<mn>13</mn>}}$.

How many pieces does the master prepare in a day?

The master prepares