When Mr. Zhang drove from home to school, the fuel consumption was 0.6 liters when the road was smooth, which was 20% less than when the road was congested. How many liters of fuel does it consume in a traffic jam? (column equation solution)
张老师开车从家到学校，在道路通畅的情况下耗油0.6升，比在道路拥堵的情况下耗油量节省了20%．在道路拥堵的情况下耗油约多少升？(列方程解答)
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">0.6 / (4/5)</gadget>
<output>0.75</output>

<result>0.75</result>