When transporting a pile of sand, the first time transported away all the sand (1/4), which is exactly 20t, and the second time transported all the sand (2/5). How much t is transported for the second time?
运一堆沙，第一次运走全部沙的(1/4)，正好是20t，第二次运走全部的(2/5)．第二次运走多少t？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 / (1/4)</gadget>
<output>80</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">80 * (2/5)</gadget>
<output>32</output>

<result>32</result>