To build a road, 30% of it was built in the first week, and 270 meters in the second week. Half of the road remains unrepaired. How many meters is the total length of this road?
修一条路，第一周修了它的30%，第二周修了270米．还剩下一半没修，这条路全长多少米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (1/2) - (3/10)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">270 / (1/5)</gadget>
<output>1_350</output>

<result>1_350</result>