The bottom area of a cuboid fish tank is (9/10) square meters and contains (9/25) cubic meters of water. How many meters is the water depth?
一个长方体鱼缸的底面积是(9/10)平方米，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">(9/25) / (9/10)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>