There is a full glass of boiled water, and the weight of the whole glass is 350 grams. Xiaohong weighed it after drinking half of it, and the weight of the whole glass is 200 grams. Do you know how many grams a full glass of boiled water (not including the cup) weighs?
有一满杯白开水，连杯重350克，小红喝掉一半后称了一下，连杯重200克，你知道一满杯白开水(不包括杯子)重多少克吗？
<gadget id="calculator">350 - 200</gadget>
<output>150</output>

<gadget id="calculator">150 * 2</gadget>
<output>300</output>

<result>300</result>