book has 287 pages, and it takes Xiao Ming two weeks to read it. In the first week, Xiao Ming read a total of 147 pages. In the second week, how many pages should he read every day on average?
一本书有287页，小明要用两个星期看完，第一个星期小明共看了147页，第二个星期平均每天要看多少页？
<gadget id="calculator">287 - 147</gadget>
<output>140</output>

<gadget id="calculator">140 / 7</gadget>
<output>20</output>

<result>20</result>