Three classes of the sixth grade held a tree planting activity, and a total of 480 trees were planted in the three classes. It is known that the tree planted by Class A is the sum of the trees planted by Class B and Class C (3/5), the tree planted by Class B is the sum of the trees planted by Class A and C (2/3), how many trees are planted by Class C?
六年级三个班举行植树活动，三个班共植树480棵．已知甲班植的棵树是乙丙两班植树之和的(3/5)，乙班植的棵树是甲丙两班植树之和的(2/3)，丙班植树多少棵？
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (3/8) - (2/5)</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">480 * (9/40)</gadget>
<output>108</output>

<result>108</result>