An assembly line has produced 160 TV sets in 2 hours, and how many hours will it take to complete a batch of 4,000 TV sets? (Solve with ratio)
一条流水线2小时生产了电视机160台，完成一批4000台的订单，还需几小时？(用比例解)
<gadget id="calculator">4_000 - 160</gadget>
<output>3_840</output>

<gadget id="calculator">160 / 2</gadget>
<output>80</output>

<gadget id="calculator">3_840 / 80</gadget>
<output>48</output>

<result>48</result>