The fruit store transports 540 kilograms of pineapples, 20 kilograms less than twice that of sugarcane. How many kilograms of sugarcane are imported?
水果店运进菠萝540千克，比甘蔗的2倍少20千克，运进甘蔗多少千克？
<gadget id="calculator">540 + 20</gadget>
<output>560</output>

<gadget id="calculator">560 / 2</gadget>
<output>280</output>

<result>280</result>