Sort $p$-values $p_{(1)} \leq ... \leq p_{(m)}$, find the largest $k$ such that $p_{(k)} \leq \frac{k}{m} \alpha$

Reject all $p_{(k)} < \alpha/m$

Reject all $p_{(k)} < \alpha$

Reject all $p_{(k)} < k \cdot \alpha$