Xiao Ming went to the store and bought two identical exercise books, each for 0.12 yuan, and bought a ballpoint pen for 2.15 yuan. He paid the salesperson 5 yuan, how much should he get back?
小明到商店买了2本同样的练习本，每本0.12元，又买了一支2.15元的圆珠笔．他付给营业员5元钱，应找回多少钱？
<gadget id="calculator">0.12 * 2</gadget>
<output>0.24</output>

<gadget id="calculator">0.24 + 2.15</gadget>
<output>2.39</output>

<gadget id="calculator">5 - 2.39</gadget>
<output>2.61</output>

<result>2.61</result>