Pour 40 liters of water into a glass tank with a length of 0.4 meters and a width of 0.2 meters. What is the depth in decimeters?
40升水倒入长0.4米，宽0.2米的玻璃缸中，水深多少分米．
<gadget id="calculator">0.4 * 10 * 0.2 * 10</gadget>
<output>8</output>

<gadget id="calculator">40 / 8</gadget>
<output>5</output>

<result>5</result>