Please double-check the original problem. 0.00000.9 is bad form (because of your having two periods in it).
If you wish to divide 0.000027 by 0.000009, you could rewrite both numbers in scientific notation and then perform the division:
2.7E(-5) 27E(-6)
------------ = ---------------- = 3
9E(-6) 9E(-6)
