Wang Kun went to a shopping mall and bought a basketball for 48.7 yuan and a volleyball for 49.5 yuan. He paid the cashier 100 yuan, how much should he get back?
王昆到某商场买了一个篮球48.7元，又买了一个排球49.5元．他付给收银员100元，应找回多少钱？
<gadget id="calculator">100 - 48.7 - 49.5</gadget>
<output>1.8</output>

<result>1.8</result>