To build a road, a total of 8.4 kilometers was built in the first 3 days, and an average of 3.5 kilometers per day in the next 4 days. How many meters is the average road repaired by this road repair team per day?
修一条路，前3天共修8.4千米，后4天平均每天修3.5千米，这个修路队平均每天修路多少米？
<gadget id="calculator">3.5 * 4</gadget>
<output>14</output>

<gadget id="calculator">14 + 8.4</gadget>
<output>22.4</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">22.4 / 7</gadget>
<output>3.2</output>

<gadget id="calculator">3.2 * 1_000</gadget>
<output>3_200</output>

<result>3_200</result>