A football costs 48.30 yuan, a basketball costs 54.20 yuan, Mr. Wang buys a football and a basketball for 150 yuan, how much should I get back?
一个足球48.30元，一个篮球54.20元，王老师用150元买足球、篮球各一个，应找回多少元？
<gadget id="calculator">48.3 + 54.2</gadget>
<output>102.5</output>

<gadget id="calculator">150 - 102.5</gadget>
<output>47.5</output>

<result>47.5</result>