It used to be 36 kWh to process a part, but now it saves 15% compared to the original one. Now how much kWh is needed to process a part.
原来加工一个零件要用36千瓦时电，现在比原来节约15%，现在加工一个零件需要多少千瓦时电．
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">36 * (17/20)</gadget>
<output>153/5 = around 30.6</output>

<result>153/5 = around 30.6</result>