A worker builds a road, 25 meters a day for the first 3 days, and 80 meters a day for the next 4 days. How many meters are the workers built in these 7 days?
工人师傅修一条路，前3天每天修25米，接下来的4天每天修80米，这7天工人师傅共修路多少米？
<gadget id="calculator">25 * 3</gadget>
<output>75</output>

<gadget id="calculator">80 * 4</gadget>
<output>320</output>

<gadget id="calculator">75 + 320</gadget>
<output>395</output>

<result>395</result>