A toy originally cost 40 yuan each. Now each item is 20% cheaper than before, how much is it cheaper now?
一种玩具，原来每件是40元．现在每件比原来降价20%，现在比原来便宜多少元？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">40 * (1/5)</gadget>
<output>8</output>

<result>8</result>