The net weight of a bottle of hot sauce is 350 grams, and the weight of the bottle is 500 grams. How many grams does the empty bottle weigh?
一瓶辣酱的净重是350克，连瓶重500克，空瓶重多少克．
<gadget id="calculator">500 - 350</gadget>
<output>150</output>

<result>150</result>