There is a batch of goods that shipped 2/5 of the total amount on the first day, 37.5% of the first day on the second day, and 18 tons on the third day, which was just finished. How many tons are there in total?
有一批货物，第一天运了总数的(2/5)，第二天运的是第一天的37.5%，第三天运了18吨，正好运完，这批货一共有多少吨？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">37.5 / 100</gadget>
<output>0.375</output>

<gadget id="calculator">(2/5) * 0.375</gadget>
<output>0.15</output>

<gadget id="calculator">1 - (2/5) - 0.15</gadget>
<output>0.45</output>

<gadget id="calculator">18 / 0.45</gadget>
<output>40</output>

<result>40</result>