To build a road, the full length (1/3) was repaired in the first week, and 5 meters more than the full length (2/5) was repaired in the second week, leaving 51 meters to be repaired. How long is this road in meters?
修一条路，第一周修了全长的(1/3)，第二周修的比全长的(2/5)多5米，还剩51米没修．这条路全长多少米？
<gadget id="calculator">51 + 5</gadget>
<output>56</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (1/3) - (2/5)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">56 / (4/15)</gadget>
<output>210</output>

<result>210</result>