A story book has 560 pages. I read the whole book (2/7) in the first week, and read the whole book (3/8) in the second week. How many pages are left?
一本故事书560页，第一周看了全书的(2/7)，第二周看了全书的(3/8)，还剩多少页没看？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">560 * (2/7)</gadget>
<output>160</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">560 * (3/8)</gadget>
<output>210</output>

<gadget id="calculator">560 - 160 - 210</gadget>
<output>190</output>

<result>190</result>