There are 40 red balls in the bag, there are more white balls than red balls (1/5), how many more white balls than red balls?
袋子里有40个红球，白球比红球多(1/5)，白球比红球多多少个？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<result>8</result>