Zhang Hua read 42 pages of the fable in 3 days. According to this speed, he will just finish reading this book in 4 days. How many pages does this book have?
张华3天看了42页寓言故事，按照这样的速度，他再看4天正好看完这本书，这本书有多少页？
<gadget id="calculator">42 / 3</gadget>
<output>14</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">14 * 7</gadget>
<output>98</output>

<result>98</result>