Miaoxiang has 36 stamps, Qisi's stamp is Miaoxiang's (2/3), Qisi's stamp is Xiaoxiao's stamp (6/7), how many stamps does Xiaoxiao have?
妙想有36枚邮票，奇思的邮票是妙想的(2/3)，奇思的邮票是笑笑的邮票的(6/7)，笑笑有多少枚邮票？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">(2/3) / (6/7)</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">36 * (7/9)</gadget>
<output>28</output>

<result>28</result>