There are 18 basketballs in the school, 4 fewer footballs than basketballs, and 3 times as many badmintons as footballs. How many badmintons are there?
学校有18个篮球，足球比篮球少4个，羽毛球的个数是足球的3倍．羽毛球有多少个？
<gadget id="calculator">18 - 4</gadget>
<output>14</output>

<gadget id="calculator">14 * 3</gadget>
<output>42</output>

<result>42</result>