Tongtong Stationery Company planned to sell 55,800 yuan in May, but actually completed the task 4 days ahead of schedule, which was an increase of 90 yuan compared with the plan. What is the actual average daily sales volume?
通通文具公司计划5月份销售额达到55800元，实际提前4天就完成了任务，还比计划增加了90元，实际平均每天的销售额是多少元．
<gadget id="calculator">55_800 + 90</gadget>
<output>55_890</output>

<gadget id="calculator">31 - 4</gadget>
<output>27</output>

<gadget id="calculator">55_890 / 27</gadget>
<output>2_070</output>

<result>2_070</result>