A small team has built a road (5/6), and it exceeds the midpoint by 300 meters. Find the total length?
一小队修一条公路已经修了(5/6)，超过中点300米，求总长度？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(5/6) - (1/2)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">300 / (1/3)</gadget>
<output>900</output>

<result>900</result>