A bouquet of lilies costs 4.8 yuan, and a bouquet of roses costs 9.7 yuan. Mom bought these two bunches of flowers for 20 yuan, how much money is left?
一束百合4.8元，一束玫瑰9.7元．妈妈用20元钱买这两束花，还剩多少钱？
<gadget id="calculator">4.8 + 9.7</gadget>
<output>14.5</output>

<gadget id="calculator">20 - 14.5</gadget>
<output>5.5</output>

<result>5.5</result>