From March 28 to April 5, Wang Xiaogang wrote a total of 207 big characters. How many big characters does he write on average every day?
王小刚从3月28日到4月5日，共写了207个大字，他平均每天写多少个大字？
<gadget id="calculator">31 - 28</gadget>
<output>3</output>

<gadget id="calculator">3 + 1 + 5</gadget>
<output>9</output>

<gadget id="calculator">207 / 9</gadget>
<output>23</output>

<result>23</result>