A pen is 12.6 yuan, and a stationery box is 37.8 yuan. Xiao Ming bought two pens and a pencil case, how much does it cost?
一枝钢笔12.6元，一个文具盒37.8元．小明买了两枝钢笔和一个文具盒，需要多少元？
<gadget id="calculator">12.6 * 2</gadget>
<output>25.2</output>

<gadget id="calculator">37.8 * 1</gadget>
<output>37.8</output>

<gadget id="calculator">25.2 + 37.8</gadget>
<output>63</output>

<result>63</result>