There are two typists, A and B, A types 4800 per hour, and B's per hour's typing is A's (2/3). How many hours will it take for A and B to type an 80,000-word manuscript together?
甲、乙两个打字员，甲每小时打字4800个，乙每小时打字的个数是甲的(2/3)．甲、乙两人一起打一份8万字的稿件，需要多少小时？
<gadget id="calculator">8 * 10_000</gadget>
<output>80_000</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">4_800 * (2/3)</gadget>
<output>3_200</output>

<gadget id="calculator">4_800 + 3_200</gadget>
<output>8_000</output>

<gadget id="calculator">80_000 / 8_000</gadget>
<output>10</output>

<result>10</result>