The school plans to build a new rectangular flower garden with a length of 7 meters and a width of 12 meters on the campus. During the actual construction, the width of the flowerbed was changed to 6 meters to protect a big tree. If the area is to be kept constant, how many meters should the length of the flowerbed be built?
学校准备在校园里新建一个长7米，宽12米的长方形花圃．实际施工时，因为要保护一棵大树，花圃的宽改为6米．如果要使面积不变，花圃的长应该建多少米？
<gadget id="calculator">12 / 6</gadget>
<output>2</output>

<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<result>14</result>