The total weight of a bottle of oil is 5.02 kg, and the weight of the bottle is 0.28 kg. What is the net weight of this bottle of oil?
一瓶油连瓶共重5.02千克，瓶重0.28千克，这瓶油净重多少千克．
<gadget id="calculator">5.02 - 0.28</gadget>
<output>4.74</output>

<result>4.74</result>