The price of a batch of goods is reduced by 20% for the first time, and the price is reduced by 15% for the second time. How much is the price of this batch of goods lower than the original price?
一批货物第一次降价20%，第二次按降价后的价格又降价15%，这批货物的价格比原价格降低多少．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">100 * (4/5)</gadget>
<output>80</output>

<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">80 * (17/20)</gadget>
<output>68</output>

<gadget id="calculator">100 - 68</gadget>
<output>32</output>

<gadget id="calculator">32 / 100</gadget>
<output>8/25 = around 0.32</output>

<result>8/25 = around 0.32</result>