Students from two classes in grade six planted trees together. Among them, the first class planted 80 trees, and the number of trees planted by the second class was (9/8) times that of the first class. How many more trees were planted by the second class than the first class?
六年级两个班学生共同植树．其中，一班植树80棵，二班植树的棵数是一班的(9/8)倍，二班比一班多植树多少棵？
<gadget id="calculator">9 / 8</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">80 * (9/8)</gadget>
<output>90</output>

<gadget id="calculator">90 - 80</gadget>
<output>10</output>

<result>10</result>