We have collected cans and beverage bottles, there are 6 cans. Each is 0.12 yuan, a total of 1.8 yuan sold. How many drink bottles are there?
我们收集了易拉罐和饮料瓶，易拉罐有6个．每个都是0.12元，一共卖了1.8元．饮料瓶有几个？
<gadget id="calculator">1.8 / 0.12</gadget>
<output>15</output>

<gadget id="calculator">15 - 6</gadget>
<output>9</output>

<result>9</result>