Dongdong and his four friends wrote a total of 980 brush characters in one week. How many characters do they write on average per day?
东东和他的4个朋友一个星期一共写了980个毛笔字，平均每人每天写多少个字？
<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">980 / 5 / 7</gadget>
<output>28</output>

<result>28</result>