The milk specialty store sold 40 packs of calcium-added milk today, which happens to be pure milk (2/5). The pure milk sold today happens to be yogurt (5/6), how many packs of yogurt are sold today?
牛奶专卖店今天卖出加钙牛奶40包，恰好是纯牛奶的(2/5)．今天卖出的纯牛奶又正好是酸牛奶的(5/6)，今天卖出酸牛奶多少包？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">40 / (2/5) / (5/6)</gadget>
<output>120</output>

<result>120</result>