The farm harvested wheat, and harvested 150 hectares in the first 3 days. Based on this calculation, how many days will it take to harvest the remaining 600 hectares? (Solve with ratio)
农场收割小麦，前3天收割了150公顷．照这样计算，要收割完剩下的600公顷，还需要几天？(用比例解)
<gadget id="calculator">150 / 3</gadget>
<output>50</output>

<gadget id="calculator">600 / 50</gadget>
<output>12</output>

<result>12</result>