There is a batch of cement on the construction site, 1/4 of the total amount was used in the morning, and 40% of the total amount was used in the afternoon, leaving 14 tons. How many tons is this batch of cement?
工地有一批水泥，上午用了总数的(1/4)，下午用了总数的40%，还剩下14吨，这批水泥有多少吨？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (1/4) - (2/5)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">14 / (7/20)</gadget>
<output>40</output>

<result>40</result>