A road has been built (1/6), and another 50 meters will be built. The ratio of the repaired to the remaining is 1:4. How many meters is this road?
一条路，已修了(1/6)，再修50米，已修的与剩下的比是1：4，这条路多少米？
<gadget id="calculator">1 + 4</gadget>
<output>5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/5) - (1/6)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">50 / (1/30)</gadget>
<output>1_500</output>

<result>1_500</result>