A batch of goods has been transported away (2/5), leaving 150 tons. How many tons did this shipment originally weigh?
一批货物运走了(2/5)，还剩下150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">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">150 / (3/5)</gadget>
<output>250</output>

<result>250</result>