A construction team transported 40 tons of cement to the construction site, and used 25% of this batch of cement in 5 days. According to this calculation, how many days can this batch of cement be used in total?
某建筑队工地运来40吨水泥，5天用了这批水泥的25%，照这样计算，这批水泥一共可用多少天？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) / 5</gadget>
<output>1/20 = around 0.05</output>

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

<result>20</result>