Workers in the first workshop of a machine tool factory use 18 lathes to produce 720 machine parts in 2 hours, how many machine parts can be produced in 3 hours with 20 such lathes.
某机床厂第一车间的职工，用18台车床，2小时生产机器零件720件，20台这样的车床3小时可生产机器零件多少件．
<gadget id="calculator">720 / 18 / 2</gadget>
<output>20</output>

<gadget id="calculator">20 * 20 * 3</gadget>
<output>1_200</output>

<result>1_200</result>