During the "June 1st" period, Xinhua Bookstore sells children's books with a 15% discount. Congcong wants to buy a set of comic books with an original price of 240 yuan. How much can it be cheaper?
"六一"期间，新华书店少儿书籍八五折销售，聪聪想买一套原价240元的连环画册，可以便宜多少钱？
<gadget id="calculator">85 / 100</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">240 * (3/20)</gadget>
<output>36</output>

<result>36</result>