Among the following three numbers, how many can form a ratio with 2, 3, 6
下列三个数中，能与2、3、6组成一个比例的是多少
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">6 / (2/3)</gadget>
<output>9</output>

<result>9</result>