An engineering team builds roads, 12.5 meters a day in the first 4 days, and 58 meters in total in the next 5 days. How many meters are built on average per day?
一个工程队修筑公路，前4天每天筑路12.5米，后5天共筑路58米．平均每天筑路多少米？
<gadget id="calculator">12.5 * 4</gadget>
<output>50</output>

<gadget id="calculator">50 + 58</gadget>
<output>108</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">108 / 9</gadget>
<output>12</output>

<result>12</result>