The Hongqi engineering team repaired a section of road, and repaired (21/25) kilometers in 7 days. How many miles per day on average?
红旗工程队修一段公路，7天修了(21/25)千米．平均每天修多少千米？
<gadget id="calculator">21 / 25</gadget>
<output>21/25 = around 0.84</output>

<gadget id="calculator">(21/25) / 7</gadget>
<output>3/25 = around 0.12</output>

<result>3/25 = around 0.12</result>