The students have to plant a total of 387 apple trees and 276 pear trees, and 238 have been planted. How many are still left?
同学们一共要植387棵苹果树和276棵梨树，已经植了238棵，还有多少棵没有植？
<gadget id="calculator">276 - 238</gadget>
<output>38</output>

<gadget id="calculator">387 + 38</gadget>
<output>425</output>

<result>425</result>