There are 150 red flags, and yellow flags are 28% less than red flags. How many yellow flags are there?
有红旗150面，黄旗比红旗少28%．黄旗有几面？
<gadget id="calculator">28 / 100</gadget>
<output>7/25 = around 0.28</output>

<gadget id="calculator">1 - (7/25)</gadget>
<output>18/25 = around 0.72</output>

<gadget id="calculator">150 * (18/25)</gadget>
<output>108</output>

<result>108</result>