He obviously spent 2.5 yuan on the picture book, and now he has 3 yuan left. How much money did he have?
明明买图画本用去了2.5元，他现在还剩3元钱，他原来有多少钱？
<gadget id="calculator">2.5 + 3</gadget>
<output>5.5</output>

<result>5.5</result>