A copy of "Happy Learning Mathematics" is priced at 4.5 yuan, and a copy of "Mathematics PHS" is priced at 2.8 yuan. Wang Peng has 10 yuan, he bought a copy of each, how much money is left?
一本《快乐学数学》定价4.5元，一本《数学小灵通》定价2.8元．王鹏有10元钱，他各买了一本，还剩下多少钱？
<gadget id="calculator">10 - 4.5 - 2.8</gadget>
<output>2.7</output>

<result>2.7</result>