+---+     +---+     +---+
|   |  X  |   |  X  |   | = 54
+---+     +---+     +---+
  X         X         X
+---+     +---+     +---+
|   |  X  |   |  X  |   | = 120
+---+     +---+     +---+  
  X         X         X
+---+     +---+     +---+
|   |  X  |   |  X  |   | = 56
+---+     +---+     +---+
  =         =         =
 96        180       21

Use each of the digits from 1 to 9 exactly once to satisfy this cross product puzzle.
How fast can you come up with the solution using only p&p (no calculator)?

Extra Challenge: Can you come up with the solution in your mind (without using p&p)?