There are two types of washing powder A and B on the shelves of the Macro supermarket. There are 27 bags of type B washing powder. The ratio of the number of bags of A and B washing powder is 1:3. How many bags of type A washing powder are there on the shelf?
万家乐超市的货架上摆放了A、B两种洗衣粉，B种洗衣粉有27袋，A、B两种洗衣粉的袋数比是1：3，货架上有A种洗衣粉多少袋？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">27 * (1/3)</gadget>
<output>9</output>

<result>9</result>