A batch of goods was transported on the first day (2/5) and on the second day (7/20). A total of 375 tons were transported in two days. How many tons is this batch of goods in total?
一批货物，第一天运走(2/5)，第二天运走(7/20)，两天共运走375吨，这批货物共几吨？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">7 / 20</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">(2/5) + (7/20)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">375 / (3/4)</gadget>
<output>500</output>

<result>500</result>