Xingshan Township needs to build a 840-meter rural road. The full length (3/7) was built on the first day, and the first day (5/6) was repaired on the second day. How many meters were repaired on the second day?
杏山乡要修一条840米的乡路，第一天修了全长的(3/7)，第二天修了第一天的(5/6)，第二天修了多少米？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">(3/7) * (5/6)</gadget>
<output>5/14 = around 0.357143</output>

<gadget id="calculator">840 * (5/14)</gadget>
<output>300</output>

<result>300</result>