A schoolbag is 45 yuan, and a pencil case is 11 yuan. There are 42 students in our class. Each person sells a schoolbag and a pencil case. How much does it cost?
书包一个45元，铅笔盒一个11元，我们班有42名同学，每人卖一个书包和一个铅笔盒，一共需要多少钱？
<gadget id="calculator">45 + 11</gadget>
<output>56</output>

<gadget id="calculator">56 * 42</gadget>
<output>2_352</output>

<result>2_352</result>