When Xiaohong was doing the experiment, she filled two bottles of water. The first bottle is 1 liter more than the second bottle. If 200 ml is poured from the first bottle into the second bottle, how much more ml is the first bottle than the second bottle?
小红做实验时，盛了两瓶水．第一瓶比第二瓶多1升，如果从第一瓶中倒200毫升到第二瓶中，现在第一瓶比第二瓶多多少毫升．
<gadget id="calculator">1_800 - 1_200</gadget>
<output>600</output>

<result>600</result>