My sister spent 2.3 yuan on the book and 1.8 yuan on the book. How much did my sister spend in total? How much is the score
姐姐买书花了2.3元，买本花了1.8元，姐姐共花多少元？得数是多少元
<gadget id="calculator">2.3 + 1.8</gadget>
<output>4.1</output>

<result>4.1</result>