There are 54 people playing basketball on the playground, and the number of people skipping rope is playing basketball (2/9). How many people are skipping rope on the playground?
操场上打篮球的有54个人，跳绳的人数是打篮球的(2/9)，操场上有多少人跳绳．
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">54 * (2/9)</gadget>
<output>12</output>

<result>12</result>