Hualian Supermarket brought in 13 baskets of bananas, each weighing 38.5 kilograms, and sold 420 kilograms. How many kilograms are left?
华联超市运进13筐香蕉，每筐38.5千克，卖掉了420千克，还剩多少千克？
<gadget id="calculator">38.5 * 13</gadget>
<output>500.5</output>

<gadget id="calculator">500.5 - 420</gadget>
<output>80.5</output>

<result>80.5</result>