Zhang Hua and Liu Tao went to Xinhua Bookstore to buy the same extra-curricular book, but found that Zhang Hua's money was short of 1 yuan and 5 cents, and Liu Tao's money was short of 3 yuan and 3 cents. If the two people's money is combined, it is just enough to buy a book. How much is the price of this extracurricular book?
张华和刘涛到新华书店去买同一本课外书，结果发现张华的钱缺1元5角，刘涛的钱缺3元3角．如果将两人的钱合起来，正好够买一本书．这课外书的价钱是多少元．
<gadget id="calculator">1.5 + 3.3</gadget>
<output>4.8</output>

<gadget id="calculator">1 - 1</gadget>
<output>0</output>

<gadget id="calculator">1 + 0</gadget>
<output>1</output>

<gadget id="calculator">4.8 / 1</gadget>
<output>4.8</output>

<result>4.8</result>