The original price of a set of popular science books in the bookstore is 96 yuan, and it is now on sale at a 40% discount. How much is it cheaper to buy a set?
书店有一套科普丛书原价96元，现按6折出售，买一套便宜了多少元？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">96 * (2/5)</gadget>
<output>192/5 = around 38.4</output>

<result>192/5 = around 38.4</result>