A garment factory produces a batch of children's clothing. It plans to produce 150 pieces per hour and complete it in 24 hours. It actually produces 200 sets per hour. How many hours is it actually completed (use the equation to solve it).
服装厂生产一批儿童服装，计划每小时生产150件，24小时完成，实际每小时生产200套，实际多少小时完成(用方程解)．
<gadget id="calculator">150 * 24</gadget>
<output>3_600</output>

<gadget id="calculator">3_600 / 200</gadget>
<output>18</output>

<result>18</result>