There are 180 purple flowers, the number of yellow flowers is (3/4) the number of red flowers, and the number of purple flowers (3/5) is the same as that of red flowers, how many yellow flowers are there?
紫花有180朵，黄花朵数是红花朵数的(3/4)，紫花朵数的(3/5)和红花一样多，黄花有多少朵？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">180 * (3/5) * (3/4)</gadget>
<output>81</output>

<result>81</result>