Three classes of the sixth grade in a certain school participated in the tree planting activity. The first class planted 48 trees, the number of trees planted by the second class was 5/6 of that of the first class, and the number of trees planted by the third class was 4 more than that of the second class (7/8). Tree. How many trees are planted in the third class?
某校六年级三个班参加植树活动，一班植树48棵，二班植树的棵数是一班的(5/6)，三班植树的棵数比二班的(7/8)多4棵．三班植树多少棵？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

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

<gadget id="calculator">48 * (5/6) * (7/8)</gadget>
<output>35</output>

<gadget id="calculator">35 + 4</gadget>
<output>39</output>

<result>39</result>