The supermarket brings in 350 kilograms of rice, sells 159.5 kilograms in the morning and 140.5 kilograms in the afternoon, how many kilograms are left?
超市运进350千克大米，上午卖出159.5千克，下午卖出140.5千克，还剩多少千克？
<gadget id="calculator">159.5 + 140.5</gadget>
<output>300</output>

<gadget id="calculator">350 - 300</gadget>
<output>50</output>

<result>50</result>