To dig a 40m*3 cellar, the cellar is 5m long and 5m wide, how many meters should be dug deep?
要挖一个40m**3的地窖，地窖长5m，宽5m，应该挖多少米深．
<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">40 / 25</gadget>
<output>8/5 = around 1.6</output>

<result>8/5 = around 1.6</result>