To transport a batch of goods, if 6 tons are transported every day, it will take 20 days to finish the shipment; if more than 2 tons are shipped every day, how many days will it take to finish the shipment?
运一批货，如果每天运走6吨，要20天运完；如果每天多运2吨，需要多少天可以运完？
<gadget id="calculator">6 + 2</gadget>
<output>8</output>

<gadget id="calculator">20 / 8</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">6 * (5/2)</gadget>
<output>15</output>

<result>15</result>