To build a road, 140m was built in the first month, 160m in the second month, and 150m in the third month. The rest is repaired (4/5). How many meters is the total length of this road?
修一条路，第一个月修了140m，第二个月修了160m，第三个月修了150m．剩下的是已修的(4/5)，这条路全长多少米？
<gadget id="calculator">140 + 160 + 150</gadget>
<output>450</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">450 * (4/5)</gadget>
<output>360</output>

<gadget id="calculator">360 + 450</gadget>
<output>810</output>

<result>810</result>