Xiao Wang reads a story book. He read 3 pages on the first day, and the number of pages he read every day is twice that of the previous day. Xiao Wang spent 5 days reading this book. How many pages does this book have?
小王看一本故事书，第一天看了3页，以后每天看的页数是前一天的2倍，小王用用了5天看完这本书，这本书一共有多少页？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3 * 4</gadget>
<output>12</output>

<gadget id="calculator">2 ** 3</gadget>
<output>8</output>

<gadget id="calculator">3 * 8</gadget>
<output>24</output>

<gadget id="calculator">2 ** 4</gadget>
<output>16</output>

<gadget id="calculator">3 * 16</gadget>
<output>48</output>

<gadget id="calculator">3 + 6 + 12 + 24 + 48</gadget>
<output>93</output>

<result>93</result>