A and B recite English words. A recites 8 more English words than B every day. B stops for 10 days because of illness. After 40 days, B's memorized words are exactly half of A's, and how many words are A's memorized.
甲、乙两人背诵英语单词，甲比乙每天多背8个，乙因生病，中途停止10天．40天后，乙背的单词正好是甲的一半，甲背单词多少个．
<gadget id="calculator">40 * 8</gadget>
<output>320</output>

<gadget id="calculator">10 * 8</gadget>
<output>80</output>

<gadget id="calculator">320 - 80</gadget>
<output>240</output>

<gadget id="calculator">40 / 2</gadget>
<output>20</output>

<gadget id="calculator">40 - 10 - 20</gadget>
<output>10</output>

<gadget id="calculator">240 / 10</gadget>
<output>24</output>

<gadget id="calculator">24 * 40</gadget>
<output>960</output>

<result>960</result>