It costs 22 yuan to send mail, and Uncle Wang paid 200 yuan when he sent the mail, and got back 46 yuan. How many mails did he send in total?
寄邮件每份要22元，王叔叔寄邮件的时候付出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>