[roywiggins]

They're the same, surely?

  (p/q)*(p/q)
  = p*(1/q)*p*(1/q)
  = p*p*(1/q)*(1/q)
  = (p*p)/(q*q)

Or

  (p/q)*(p/q) 
  = ((p/q)*p)/q
  = ((p*p)/q)/q
  = (p*p)/(q*q)