A cuboid fish tank is (9/10) meters long and 0.8 meters wide, and contains (9/25) cubic meters of water. How deep is the water?
一个长方体鱼缸长(9/10)米，宽0.8米，里面盛有(9/25)立方米的水，水深多少米？
<gadget id="calculator">9 / 25</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(9/10) * 0.8</gadget>
<output>0.72</output>

<gadget id="calculator">(9/25) / 0.72</gadget>
<output>0.5</output>

<result>0.5</result>