Three classes of the sixth grade participated in the tree planting activity. Among them, the first class planted 72 trees, the number of trees planted by the second class was 7 more than that of the first class (7/9), and more than that of the third class (1/8). How many trees were planted in total by the three classes?
六年级三个班参加植树活动．其中，一班植树72棵，二班植树的棵数比一班植的(7/9)多7棵，比三班植的多(1/8)，三个班一共植树多少棵？
<gadget id="calculator">56 + 7</gadget>
<output>63</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">63 / (7/8)</gadget>
<output>72</output>

<gadget id="calculator">72 + 63 + 72</gadget>
<output>207</output>

<result>207</result>