Dig a canal 810 meters long, dug (1/3) in the first week, and dug the first week (1/3) in the second week. How many meters did you dig in the second week?
挖一条长810米的水渠，第一周挖了(1/3)，第二周挖了第一周(1/3)．第二周挖了多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">810 * (1/3) * (1/3)</gadget>
<output>90</output>

<result>90</result>