Xiao Ming and Xiao Hua wrote a total of 160 brush characters in 4 days. How many do they write each day on average?
小明与小华4天共写了160个毛笔字，平均每人每天写多少个？
<gadget id="calculator">160 / 4 / 2</gadget>
<output>20</output>

<result>20</result>