A road construction team repaired a highway, the first phase of the project repaired 30% of the total length, and the second phase of the project repaired 50% of the total length, leaving 245 meters unrepaired. How long is this road in meters?
某修路队修一条公路，第一期工程修了全长的30%，第二期工程式修了全长的50%，还剩245米没有修．这条公路全长多少米？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(3/10) + (1/2)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">245 / (1/5)</gadget>
<output>1_225</output>

<result>1_225</result>