There are 259 kilograms of apples in the store, and 135 kilograms of apples have been sold. How many kilograms of apples are left?
商店有259千克苹果，已经卖出135千克苹果，还剩多少千克苹果？
<gadget id="calculator">259 - 135</gadget>
<output>124</output>

<result>124</result>