From July 17th to 24th, Xiao Ming insisted on writing big characters every day, and wrote a total of 120 big characters. How many big characters did he write on average every day?
小明从7月17日到24日，每天坚持写大字，共写了120个大字，他平均每天写了多少大字？
<gadget id="calculator">24 - 17</gadget>
<output>7</output>

<gadget id="calculator">7 + 1</gadget>
<output>8</output>

<gadget id="calculator">120 / 8</gadget>
<output>15</output>

<result>15</result>