A measuring cup filled with 500ml of water, after putting 1 iron block, the water level rises to 700ml, what is the volume of the iron block in cubic decimeters?
一个盛有500ml水的量杯，放入1个铁块后，水面上升到700ml的地方，这个铁块的体积是多少立方分米．
<gadget id="calculator">700 - 500</gadget>
<output>200</output>

<gadget id="calculator">200 / 1_000</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>