If a tractor plows 8 hectares of land every day, it can be plowed in 6 days; in fact, the task is completed one day earlier, and the work efficiency has been greatly improved.
用一台拖拉机耕地，如果每天耕地8公顷，6天可以耕完；实际提前一天完成任务，工作效率提高了多少．
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

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

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/5) - (1/6)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">(1/30) / (1/6)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>