Among the following numbers, x=how much is the solution of 3.6x/8=9.
下面各数中，x=多少是3.6x/8=9的解．
<gadget id="calculator">9 * 8</gadget>
<output>72</output>

<gadget id="calculator">72 / 3.6</gadget>
<output>20</output>

<result>20</result>