Make flowers with 8-meter-long ribbons, and use (2/3) meters of ribbons for each flower. Give 4 of them to classmates, how many flowers are left?
用长8米的彩带做花，每朵花用(2/3)米的彩带．把其中的4朵送给了同学，还剩几朵花？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">8 / (2/3)</gadget>
<output>12</output>

<gadget id="calculator">12 - 4</gadget>
<output>8</output>

<result>8</result>