Convenience Supermarket shipped back 425 boxes of milk, sold 135 boxes in the morning and 186 boxes in the afternoon, how many boxes are left.
便民超市运回425箱牛奶，上午卖出135箱，下午卖出186箱，还剩多少箱．
<gadget id="calculator">425 - 135 - 186</gadget>
<output>104</output>

<result>104</result>