B4. In the square of numbers below, positive numbers are listed. The product of the numbers in each row, each column, and each of the two diagonals is always the same.

What number is in the position of $H$?

| $\frac{1}{2}$ | 32 | $A$ | $B$ |
| :---: | :---: | :---: | :---: |
| $C$ | 2 | 8 | 2 |
| 4 | 1 | $D$ | $E$ |
| $F$ | $G$ | $H$ | 16 |