Xiaohong reads a story book, he reads 6 pages every day, and reads (2/7) of this book in 5 days, how many pages does this book have?
小红看一本故事书，他每天看6页，5天看了这本书的(2/7)，这本书有多少页？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">6 / (2/7)</gadget>
<output>21</output>

<gadget id="calculator">5 * 21</gadget>
<output>105</output>

<result>105</result>