It took Xiao Wang 18 minutes to process a part, but now it takes 6 minutes. How much has Xiao Wang’s work efficiency improved compared to before?
加工一个零件，小王原来要18分钟，现在要6分钟，小王的工作效率比原来提高了多少
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 18</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">(1/6) - (1/18)</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(1/9) / (1/18)</gadget>
<output>2</output>

<result>2</result>