Use a cup to pour water into an empty bottle. If 3 cups of water are poured into it, the total weight of the bottle is 440 grams. If 5 cups of water are poured in, the total weight of the bottle is 600 grams. What is the total weight of a glass of water and an empty bottle?
用一个杯子向一个空瓶子里倒水，如果倒进3杯水，连瓶共重440克．如果倒进5杯水，连瓶共重600克．那么一杯水与一个空瓶共重多少克．
<gadget id="calculator">3 * 80</gadget>
<output>240</output>

<gadget id="calculator">440 - 240</gadget>
<output>200</output>

<gadget id="calculator">200 + 80</gadget>
<output>280</output>

<result>280</result>