A cuboid water tank, measured from the inside, has a length of 1 meter, a width of 1/2 the length, and a water depth of 0.5 meters. A watermelon is placed in it. After it is completely submerged, the water level rises by 0.2 decimeters. What is the volume of the watermelon in cubic centimeters? rice?
一个长方体水箱，从里面量，长是1米，宽是长的二分之一，水深0.5米，放入一个西瓜，完全浸没后，水面上升了0.2分米，这个西瓜的体积是多少立方分米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">0.2 / 10</gadget>
<output>0.02</output>

<gadget id="calculator">1 * 1 * (1/2) * 0.02 * 1_000</gadget>
<output>10</output>

<result>10</result>