Xiaogang, Xiaojun and Xiaohong wrote a total of 240 brush characters in 4 days. How many did each person write on average per day? (Substitute the result into the original question after answering)
小刚、小军和小红4天共写240个毛笔字，平均每人每天写了多少个？(解答后把得数代入原题检验)
<gadget id="calculator">240 / 4 / 3</gadget>
<output>20</output>

<result>20</result>