In art, the most beautiful ratio is called the golden ratio. Its ratio is 1:0.618. To make the height and diameter of Chongguang Pagoda have a golden ratio, if the height is 20m, what is the diameter in m?
在美术中，让人觉得最美的比例叫黄金比例，它的比例是1：0.618，要让重光宝塔的高和直径成黄金比例，如果高是20m，直径应是多少m．
<gadget id="calculator">1 / 0.618</gadget>
<output>1.618123</output>

<gadget id="calculator">20 / 1.618123</gadget>
<output>12.36</output>

<result>12.36</result>