A triangle has a height of 18 centimeters and an area of 108 square centimeters. What is the base in centimeters?
一个三角形，高是18厘米，面积是108平方厘米，底是多少厘米．
<gadget id="calculator">2 / 18</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">108 * (1/9)</gadget>
<output>12</output>

<result>12</result>