For a batch of goods, (3/5) of the total number is transported for the first time, and (1/4) of the total number is transported for the second time. The first time was 70 tons more than the second time. How many tons did this batch of goods originally have?
一批货物，第一次运走总数的(3/5)，第二次运走总数的(1/4)．第一次比第二次多70吨，这批货物原来有多少吨？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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

<gadget id="calculator">(3/5) - (1/4)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">70 / (7/20)</gadget>
<output>200</output>

<result>200</result>