A fairy tale is 12.50 yuan, and a dictionary is 55.62 yuan. Xiaolin paid the salesperson 100 yuan to buy these two things, how much should be recovered.
一本童话故事12.50元，一本字典55.62元，小林付给售货员100元买这两样东西，应找回多少元．
<gadget id="calculator">12.5 + 55.62</gadget>
<output>68.12</output>

<gadget id="calculator">100 - 68.12</gadget>
<output>31.88</output>

<result>31.88</result>