Li Hong has 18 cards, Zhang Qiang has 22 cards, Zhao Liang and Sun Hao each have 16 cards, how many cards does each have on average?
李红有卡片18张，张强有卡片22张，赵亮和孙浩各有卡片16张，平均每人有卡片多少张？
<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<gadget id="calculator">18 + 22 + 32</gadget>
<output>72</output>

<gadget id="calculator">72 / 4</gadget>
<output>18</output>

<result>18</result>