Xiao Ming bought a schoolbag of 35.6 yuan and a stationery box of 12.6 yuan. He paid 50 yuan. How much should he get back?
小明买了1个35.6元的书包和1个12.6元的文具盒，他付了50元，应该找回多少钱？
<gadget id="calculator">35.6 + 12.6</gadget>
<output>48.2</output>

<gadget id="calculator">50 - 48.2</gadget>
<output>1.8</output>

<result>1.8</result>