Folding a lucky star requires (3/5) decimeter colored ribbon, and a roll of 12 decimeter colored ribbon has been used (1/4), how many lucky stars have been folded?
折一个幸运星要用(3/5)分米彩带，一卷12分米的彩带已经用了(1/4)，已经折了多少个幸运星？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(1/4) / (3/5)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">12 * (5/12)</gadget>
<output>5</output>

<result>5</result>