There is a cuboid fish tank with a length of 9dm, a width of 6dm and a height of 7dm. Put a piece of coral stone (completely submerged) and the water surface rises by 5cm. What is the volume of this piece of coral stone?
有一个长方体鱼缸，长9dm，宽6dm，高是7dm．放进一块珊瑚石(完全沉没)水面升高了5cm，这块珊瑚石的体积是多少？
<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">9 * 6 * (1/2)</gadget>
<output>27</output>

<result>27</result>