A and B represent two numbers, if A*B=((A+B)/2), find the value of 10*(5*3).
A、B表示两个数，若A*B=((A+B)/2)，求10*(5*3)的值．
<gadget id="calculator">10 + 4</gadget>
<output>14</output>

<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<result>7</result>