A book with 261 pages in total, Monday. two. 3. Read 35 pages a day in these three days. If you want to finish reading this week, how many pages do you need to read on average every day?
一本书共261页，星期一．二．三这三天每天看35页，如果想在这个星期看完，剩余平均每天要看多少页？
<gadget id="calculator">35 * 3</gadget>
<output>105</output>

<gadget id="calculator">261 - 105</gadget>
<output>156</output>

<gadget id="calculator">7 - 3</gadget>
<output>4</output>

<gadget id="calculator">156 / 4</gadget>
<output>39</output>

<result>39</result>