The price of a pencil case is 13.15 yuan, and the price of a pen is three times that of this pencil case. How much does it cost to buy a fountain pen and a stationery box?
一只文具盒的价格是13.15元，一枝钢笔的价格是这只文具盒的3倍．买一枝钢笔和一只文具盒共要多少元钱？
<gadget id="calculator">13.15 * 3</gadget>
<output>39.45</output>

<gadget id="calculator">39.45 + 13.15</gadget>
<output>52.6</output>

<result>52.6</result>