Define a new operation: A*B=(AB)/3, A□B=(A+B)*3, please calculate: (39*12)□3=how much.
定义新运算：A*B=(A-B)/3，A□B=(A+B)*3，请计算：(39*12)□3=多少．
<gadget id="calculator">39 - 12</gadget>
<output>27</output>

<gadget id="calculator">27 / 3</gadget>
<output>9</output>

<gadget id="calculator">9 + 3</gadget>
<output>12</output>

<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<result>36</result>