A and B represent two numbers, A*B=((A+B)/3), find the value of 10*(6*9).
A，B表示两个数，A※B=((A+B)/3)，求10※(6※9)的值．
<gadget id="calculator">6 + 9</gadget>
<output>15</output>

<gadget id="calculator">15 / 3</gadget>
<output>5</output>

<result>5</result>