An engineering team repairs a section of road, the ratio of the length of the repaired to the length of the unrepaired is 3:4, if it is repaired for another 50 meters, it is exactly half of the repair, how many meters is the total length of this section of road?
某工程队修一段路，已修长度与未修长度之比为3：4，如果再修50米，正好修了一半，这段路全长多少米？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(1/2) - (3/7)</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">50 / (1/14)</gadget>
<output>700</output>

<result>700</result>