Sending mail by EMS costs 22 yuan per copy. Uncle Wang paid 200 yuan when he sent the mail, and got 46 yuan back. How many mails did he send in total?
通过特快专递寄邮件每份需要22元．王叔叔寄邮件时付出200元，找回46元．他共寄了几份邮件？
<gadget id="calculator">200 - 46</gadget>
<output>154</output>

<gadget id="calculator">154 / 22</gadget>
<output>7</output>

<result>7</result>