Wang Hua and Sun Li started to record a manuscript at the same time, and the recording was finished in 28 minutes. Wang Hua typed an average of 90 words per minute, and Sun Li typed an average of 73 words per minute. How many more words did Wang Hua type than Sun Li?
王华和孙丽同时开始录入一份稿件，28分钟正好录完．王华平均每分钟打字90个，孙丽平均每分钟打字73个，王华比孙丽多录入多少个字？
<gadget id="calculator">90 - 73</gadget>
<output>17</output>

<gadget id="calculator">17 * 28</gadget>
<output>476</output>

<result>476</result>