Xiao Ming and Xiao Liang want to buy the same book, Xiao Ming brings 1.8 yuan less money, and Xiao Liang brings 1.5 yuan less money. If two people jointly buy this book and the money is just enough, what is the price of this book?
小明、小亮想买同一本书，小明带的钱少1.8元，小亮带的钱少1.5元．若两人合买这本书，钱刚好够，这本书的价钱是多少．
<gadget id="calculator">1.8 + 1.5</gadget>
<output>3.3</output>

<result>3.3</result>