Wang Ling has 4.50 yuan, buy a comic book for 1.05 yuan and a box of paint for 2.95 yuan, how much money is left?
王玲有4.50元钱，买一本1.05元的连环画和一盒2.95元的颜料，还剩多少元？
<gadget id="calculator">1.05 + 2.95</gadget>
<output>4</output>

<gadget id="calculator">4.5 - 4</gadget>
<output>0.5</output>

<result>0.5</result>