Can you guess what comes in place of the question mark?
Here's a text-based version of the table:
+----+----+----+----+
|1536| 48 | 96 | 3 |
+----+----+----+----+
|384 |192 | 24 | 12 |
+----+----+----+----+
|768 | 96 | 48 | 6 |
+----+----+----+----+
|192 | ? | 12 | 24 |
+----+----+----+----+