A road is 90 kilometers long, 40% of the total length is repaired on the first day, and the rest (4/9) is repaired on the second day, how many kilometers are repaired on the second day?
修一条路长90千米，第一天修了全长的40%，第二天修了余下的(4/9)，第二天修了多少千米？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">90 * (2/5)</gadget>
<output>36</output>

<gadget id="calculator">90 - 36</gadget>
<output>54</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">54 * (4/9)</gadget>
<output>24</output>

<result>24</result>