The height of a triangle is 15 centimeters, the area is 30 square centimeters, what is the length of the base in centimeters?
一个三角形高是15厘米，面积是30平方厘米，底边长是多少厘米？
<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">30 * (2/15)</gadget>
<output>4</output>

<result>4</result>