To build a road, 25% of the total length was built on the first day, 90 meters on the second day, and 150 meters on the third day? How many meters is this road?
修一条公路，第一天修了全长的25%，第二天修了90米，第三天修了150米？这条公路长多少米？
<gadget id="calculator">90 + 150</gadget>
<output>240</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">240 / (3/4)</gadget>
<output>320</output>

<result>320</result>