A schoolbag is 34.5 yuan more expensive than a pencil case. The price of a schoolbag is 2.5 times that of a pencil case. How much is a schoolbag?
一个书包比一个铅笔盒贵34.5元．一个书包的价钱是一个铅笔盒的2.5倍，一个书包多少钱？
<gadget id="calculator">2.5 - 1</gadget>
<output>1.5</output>

<gadget id="calculator">34.5 / 1.5</gadget>
<output>23</output>

<gadget id="calculator">23 * 2.5</gadget>
<output>57.5</output>

<result>57.5</result>