A schoolbag is 27 yuan, the price of a schoolbag is three times that of a pencil case, how much is a pencil case.
一个书包27元，书包的价格是文具盒的3倍，一个文具盒多少元．
<gadget id="calculator">27 / 3</gadget>
<output>9</output>

<result>9</result>