352. Find the common measure of angles $\alpha$ and $\beta$, if $\alpha=\beta \cdot \frac{m}{n}$, where $m$ and $n$ are natural numbers.
352. For example, $\frac{a}{m}$. Indeed, from $\alpha=\beta \cdot \frac{m}{n}$ it follows that $\frac{\alpha}{m}=\frac{\beta}{n}$, so the angle $\frac{\alpha}{m}$ fits into $\alpha$ exactly $m$ times, and into $\beta$ exactly $n$ times. (Find at least one more solution.)