A batch of goods is transported away (2/5) for the first time, and 30% for the second time. A total of 140 tons are transported in the two times. How many tons are there in this batch of goods?
一批货物，第一次运走(2/5)，第二次运走30%，两次一共运走140吨，这批货物原来有多少吨？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(2/5) + (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">140 / (7/10)</gadget>
<output>200</output>

<result>200</result>