There are 40 pieces of chocolate in a bag. Xiao Pang ate (1/5) of the bag, and Xiao Ding Ding ate (1/4) of the bag. Who ate more? How many chocolates are left in this bag?
一袋巧克力共40粒，小胖吃了(1/5)袋，小丁丁吃了(1/4)袋，谁吃得多？这袋巧克力还剩下多少粒？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/4) - (1/5)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">40 * (11/20)</gadget>
<output>22</output>

<result>22</result>