Students from three classes in grade six planted trees together. Among them, the number of trees planted by the first class is 80, the number of trees planted by the second class is that of the first class (3/4), the number of trees planted by the third class is more than that of the second class (1/4), how many trees are planted by the third class?
六年级三个班学生共同植树．其中，一班植树80棵，二班植树的棵数是一班的(3/4)，三班植树的棵数比二班多(1/4)，三班植树多少棵？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">80 * (3/4) * (5/4)</gadget>
<output>75</output>

<result>75</result>