Xiaohua practiced calligraphy, 18 on the first day and 2 days on the second day, and 40 on the third and fourth days. How many words does he practice on average every day?
小华练毛笔字，第一天和第二天各练了18个，第三天和第四天共练了40个．他平均每天练了多少个字？
<gadget id="calculator">18 * 2</gadget>
<output>36</output>

<gadget id="calculator">36 + 40</gadget>
<output>76</output>

<gadget id="calculator">76 / 4</gadget>
<output>19</output>

<result>19</result>