There are 18 people in the fifth (one) class participated in the mathematics interest group class, accounting for (1/3) of the whole class. The number of people participating in the art group accounts for (2/9) of the whole class. How many students are there in the art group?
五(一)班有18人参加了数学兴趣小组班，占全班同学的(1/3)．参加美术组的人数占全班人数的(2/9)，参加美术组的同学有多少名？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">18 / (1/3)</gadget>
<output>54</output>

<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>