To welcome the New Year, the school made a batch of paper flowers, including 140 red flowers, and there are more red flowers than yellow flowers (2/5). How many yellow flowers are there?
为迎接新年，学校制作了一批纸花，其中红花140朵，红花比黄花多(2/5)，黄花有多少朵？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">140 / (7/5)</gadget>
<output>100</output>

<result>100</result>