The product of four consecutive even numbers is 5760, what is the average of these four numbers?
四个连续的偶数的乘积是5760，这四个数的平均数是多少．
<gadget id="calculator">6 + 8 + 10 + 12</gadget>
<output>36</output>

<gadget id="calculator">36 / 4</gadget>
<output>9</output>

<result>9</result>