It used to take 6 hours to process a machine part, but it was shortened by 1 hour after the technological reform, how much the work efficiency has been improved.
加工一个机器零件，原来要6小时，技术改革后缩短1小时，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>