ok so how many kilometers are in 3273 mi?
i tried doing the following:
(3273mi/1km)(5,280/1) but i dont know if its right<--- because im missing the 3rd part
There is no need to divide by anything in this case. 5266.26 km is the answer.
If you have a conversion that does not involve 1, like 16 oz. = 453.6 g or 12 in. = 30.48 cm, then yes, would end up doing a division. For example, convert 2,000 g to oz.:
$\displaystyle 2,000\:\text{g} \times \dfrac{16\:\text{oz}}{453.6\:\text{g}}$
... you would multiply 2,000 by 16, and then divide by 453.6.