A triangle and a parallelogram have the same area. It is known that the base of the triangle is 12 cm, the height is 5 cm, the base of the parallelogram is 15 cm, what is the height in cm?
一个三角形和一个平行四边形面积相等．已知三角形底是12厘米，高是5厘米，平行四边形底是15厘米，高是多少厘米？
<gadget id="calculator">5 / 2 / 15</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">12 * (1/6)</gadget>
<output>2</output>

<result>2</result>