Xiao Ming reads a novel. He reads the whole book (3/7) in the first 3 days, and then reads it at the same speed for 2 days. There are 60 pages left. How many pages are there in this novel?
小明看一本小说，开始3天看了全书的(3/7)，以后又以同样的速度看了2天，还剩60页，这本小说共有多少页．
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(3/7) / 3</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(1/7) * 2</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(3/7) + (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">1 - (5/7)</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">60 / (2/7)</gadget>
<output>210</output>

<result>210</result>