The fruit shop shipped 100 boxes of fruit, including 35 boxes of apples, 42 boxes of pears, and the rest were oranges. How many boxes of oranges are there? (answer in two ways)
水果店运来100箱水果，其中苹果35箱，梨42箱，剩下的是橘子，橘子有多少箱？(用两种方法解答)
<gadget id="calculator">35 + 42</gadget>
<output>77</output>

<gadget id="calculator">100 - 77</gadget>
<output>23</output>

<result>23</result>