Master Zhang and Master Li worked 8 hours a day. Master Li processed 120 parts, and Master Li processed 20% more than Master Zhang. How many more parts does Master Li process than Master Zhang?
张师傅和李师傅一天工作8小时，李师傅加工了120个零件，李师傅比张师傅多加工20%．李师傅比张师傅多加工多少个零件？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">120 / (6/5)</gadget>
<output>100</output>

<gadget id="calculator">120 - 100</gadget>
<output>20</output>

<result>20</result>