In the manual class, the students made 20 red flags and 25 yellow flags, how much less red flags were made than yellow flags
手工课上同学们做了20面红旗，25面黄旗，做的红旗比黄旗少多少
<gadget id="calculator">25 - 20</gadget>
<output>5</output>

<gadget id="calculator">5 / 25</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>