For a batch of goods, 37.5% of the total amount was transported on the first day, and 25% of the total amount was transported on the second day, leaving 270 tons. How many tons is this batch of goods in total?
一批货物，第一天运走总数的37.5%，第二天运走总数的25%，还剩270吨，这批货物共多少吨？
<gadget id="calculator">37.5 / 100</gadget>
<output>0.375</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - 0.375 - (1/4)</gadget>
<output>0.375</output>

<gadget id="calculator">270 / 0.375</gadget>
<output>720</output>

<result>720</result>