A certain engineering team has built a section of road, and has completed the whole process (4/9), and there is still 10 kilometers away from the midpoint. How many kilometers is the total length of this project?
某工程队修一段公路，已经修了全程的(4/9)，距离中点还有10千米，这项工程全长多少千米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(1/2) - (4/9)</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">10 / (1/18)</gadget>
<output>180</output>

<result>180</result>