To build a road, the full length (1/6) was built on the first day, and the length (4/5) of the first day was repaired on the second day. A total of 90 meters were built in two days. How many meters were repaired on the first day?
修一条路，第一天修了全长的(1/6)，第二天修的长度是第一天的(4/5)，两天一共修了90米，第一天修了多少米？
<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">90 * (5/9)</gadget>
<output>50</output>

<result>50</result>