The sporting goods store buys back 24 basketballs, exactly (4/5) the number of footballs bought back. After selling some basketballs, the number of basketballs is equivalent to (2/3) of footballs. How many basketballs are sold?
体育用品商店购回24个篮球，正好是购回足球个数的(4/5)，卖出一部分篮球后，篮球的个数相当于足球的(2/3)，卖出篮球多少个？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">24 / (4/5)</gadget>
<output>30</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">30 * (2/3)</gadget>
<output>20</output>

<gadget id="calculator">24 - 20</gadget>
<output>4</output>

<result>4</result>