There are 1000 red balloons in the shop, 395 are sold in the morning and 315 in the afternoon, how many are left?
商店有红气球1000个，上午卖出395个，下午卖出315个，还剩多少个？
<gadget id="calculator">1_000 - 395 - 315</gadget>
<output>290</output>

<result>290</result>