Half of the total length of a rope is used up and less than 5 meters. At this time, the ratio of the used part to the remaining part is 3:4. How long is this rope in meters?
一绳子用去全长的一半少5米，这时用去的和剩下的比是3：4，这根绳子长多少米？
<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">5 / (1/14)</gadget>
<output>70</output>

<result>70</result>