It takes 3 days to build a road. On the first day, 37% of the total length was repaired. The ratio of the number of meters repaired on the second day to the third day was 4:5, and 84 meters were repaired on the second day. How long is this road in meters?
修一条路3天修完．第一天修了全长的37%，第二天和第三天修的米数的比是4：5，第二天修了84米，这条路全长多少米？
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">84 * (5/4)</gadget>
<output>105</output>

<gadget id="calculator">84 + 105</gadget>
<output>189</output>

<gadget id="calculator">37 / 100</gadget>
<output>37/100 = around 0.37</output>

<gadget id="calculator">1 - (37/100)</gadget>
<output>63/100 = around 0.63</output>

<gadget id="calculator">189 / (63/100)</gadget>
<output>300</output>

<result>300</result>