A Grimm fairy tale, I read 140 pages a week, Xiaoqiang read 154 pages a week, how many pages do I read less than Xiaoqiang every day?
一本格林童话，我一星期读了140页，小强一星期读了154页，我平均每天比小强少读多少页？
<gadget id="calculator">154 / 7</gadget>
<output>22</output>

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

<gadget id="calculator">22 - 20</gadget>
<output>2</output>

<result>2</result>