The two began to enter a manuscript at the same time, and the recording was just finished in one hour. A's typing speed is 80 words/minute, and B's typing speed is 65 words/minute. How many words does A enter more than B?
两人同时开始录入一份稿件，1小时正好录完．甲的打字速度是80字/分，乙的打字速度是65字/分．甲比乙多录入多少个字？
<gadget id="calculator">80 * 60</gadget>
<output>4_800</output>

<gadget id="calculator">65 * 60</gadget>
<output>3_900</output>

<gadget id="calculator">4_800 - 3_900</gadget>
<output>900</output>

<result>900</result>