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Counting two-headed robots

The director wants a robot with one body, one arm and two different heads like this:
We have 33 heads, 33 bodies and 33 arms to choose from. How many different robots can we make?
  • Your answer should be
  • an integer, like 66
  • a simplified proper fraction, like 3/53/5
  • a simplified improper fraction, like 7/47/4
  • a mixed number, like 1 3/41\ 3/4
  • an exact decimal, like 0.750.75
  • a multiple of pi, like 12 pi12\ \text{pi} or 2/3 pi2/3\ \text{pi}