The road repair team repaired a road, 15% of the total length was repaired on the first day, 20% of the first day was repaired on the second day, and how much of the total length was repaired on the second day.
修路队修一条公路，第一天修了全长的15%，第二天修的是第一天的20%，第二天修了全长的多少．
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/20) * (1/5)</gadget>
<output>3/100 = around 0.03</output>

<result>3/100 = around 0.03</result>