A story book is 3.78 yuan, which is 5.02 yuan cheaper than a science book. How much is a science book?
一本故事书3.78元，比一本科技书便宜5.02元，一本科技书多少元？
<gadget id="calculator">3.78 + 5.02</gadget>
<output>8.8</output>

<result>8.8</result>