It turns out that there is 600ml of water in the beaker, and the water level rises to 800ml after the iron block is put in. Is there more water? How many milliliters of water is the volume of the iron block?
原来烧杯中盛水600毫升，放入铁块后水面上升至800毫升处，水变多了吗？铁块的体积相当于多少毫升的水？
<gadget id="calculator">800 - 600</gadget>
<output>200</output>

<result>200</result>