Xiaohong goes to the stationery store to buy a ballpoint pen and a set of triangles. A pair of triangles is 1.35 yuan, and a ballpoint pen is 2.08 yuan more expensive than a pair of triangles. Xiaohong paid 5 yuan, how much should I get back?
小红到文具店买一支圆珠笔和一副三角板．一副三角板1.35元，一支圆珠笔比一副三角板贵2.08元．小红付出5元，应找回多少元？
<gadget id="calculator">1.35 + 2.08 + 1.35</gadget>
<output>4.78</output>

<gadget id="calculator">5 - 4.78</gadget>
<output>0.22</output>

<result>0.22</result>