Xiao Ming bought a 15.3 yuan tutorial book and paid 50 yuan, how much should the salesperson get back?
小明买了一本15.3元的辅导书，付出50元钱，售货员应找回多少钱？
<gadget id="calculator">50 - 15.3</gadget>
<output>34.7</output>

<result>34.7</result>