Xiao Ming read 160 pages in the first week, 20% less than the second week, and 10% more in the third week than the second week. Ask Xiao Ming how many pages he read in the third week.
小明第一周读书160页，比第二周少读20%，而第三周比第二周多读10%，问小明第三周读书多少页．
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">160 / (4/5)</gadget>
<output>200</output>

<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">200 * (11/10)</gadget>
<output>220</output>

<result>220</result>