The child made 24 red flowers, which are more than the number of yellow flowers (1/7), so how many yellow flowers were made.
小朋友做了24朵红花，比黄花的朵数多(1/7)，则黄花做了多少朵．
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 + (1/7)</gadget>
<output>8/7 = around 1.142857</output>

<gadget id="calculator">24 / (8/7)</gadget>
<output>21</output>

<result>21</result>