There are 17 pear trees, and the number of apple trees is three times that of pear trees. How many fruit trees are there in total?
梨树17棵，苹果树是梨树的3倍，一共有果树多少棵？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">17 * 4</gadget>
<output>68</output>

<result>68</result>