road repair team repaired 84 kilometers on the first day, and repaired 40% less than the first day on the second day. How many kilometers were repaired on the second day?
一个修路队，第一天修了84千米，第二天修的比第一天少修40%，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">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">84 * (3/5)</gadget>
<output>252/5 = around 50.4</output>

<result>252/5 = around 50.4</result>