They came to Dennis Department Store and found that the event sign read: 60 yuan for each water glass, buy 5 and get one free. Obviously buy 5 at a time, how much is each cheaper?
他们来到丹尼斯百货，发现活动牌上写着：每个水杯60元，买5个送一个．明明一次买5个，每个便宜多少元？
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

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

<gadget id="calculator">60 * (5/6)</gadget>
<output>50</output>

<gadget id="calculator">60 - 50</gadget>
<output>10</output>

<result>10</result>