The machine tool factory plans to produce 7,200 machine tools this year, but actually produced 2,400 in the first three months. At this speed, how many months can the annual task be completed? (Solve with ratio)
机床厂今年计划生产机床7200台，实际头三个月就生产了2400台，照这样的速度，几个月就能完成全年任务？(用比例解)
<gadget id="calculator">2_400 / 3</gadget>
<output>800</output>

<gadget id="calculator">7_200 / 800</gadget>
<output>9</output>

<result>9</result>