He Bin read a story book. He read an average of 25 pages in the first 4 days. Later, he speeded up and read 15 pages more than before. After another 6 days, he just finished reading the book. How many pages did he read on average?
何斌读一本故事书，前4天平均读25页，后来加快速度，每天比原来多读15页，这样又经过6天正好读完这本书．他平均每读了多少页？
<gadget id="calculator">25 * 4</gadget>
<output>100</output>

<gadget id="calculator">25 + 15</gadget>
<output>40</output>

<gadget id="calculator">40 * 6</gadget>
<output>240</output>

<gadget id="calculator">100 + 240</gadget>
<output>340</output>

<gadget id="calculator">4 + 6</gadget>
<output>10</output>

<gadget id="calculator">340 / 10</gadget>
<output>34</output>

<result>34</result>