The engineering team built roads, 45.9 meters of roads were built every day in the first 4 days, and a total of 225 meters of roads were built in the next 5 days. How many meters of roads are built on average every day?
工程队修筑公路，前4天每天修路45.9米，后5天共修路225米，平均每天修路多少米．
<gadget id="calculator">45.9 * 4</gadget>
<output>183.6</output>

<gadget id="calculator">183.6 + 225</gadget>
<output>408.6</output>

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

<gadget id="calculator">408.6 / 9</gadget>
<output>45.4</output>

<result>45.4</result>