Teachers and students in the fourth, fifth and sixth grades donated 700 books to Hope Primary School, the fourth grade donated 3/10 of the total, and the fifth grade donated more than the fourth grade (1/10). How many books are donated for the sixth grade?
四、五、六年级师生共向希望小学捐书700本，四年级捐的占总数的(3/10)，五年级比四年级多捐(1/10)．六年级捐书多少本？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">700 * (3/10)</gadget>
<output>210</output>

<gadget id="calculator">1 / 10</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">700 * (3/10) * (11/10)</gadget>
<output>231</output>

<gadget id="calculator">700 - 210 - 231</gadget>
<output>259</output>

<result>259</result>