Bottle A contains 600 grams of fruit juice, and bottle B contains 1 kilogram of fruit juice. How many grams should be poured from bottle B to bottle A? The weight of the two bottles of fruit juice is the same.
甲瓶有果汁600克，乙瓶有果汁1千克，应从乙瓶向甲瓶倒多少克，两瓶果汁就一样重．
<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 - 600</gadget>
<output>400</output>

<gadget id="calculator">400 / 2</gadget>
<output>200</output>

<result>200</result>