triangle and a parallelogram have the same area and the same base. Given that the height of the triangle is 4 cm, what is the height of the parallelogram in cm?
一个三角形和一个平行四边形的面积相等，底也相等．已知三角形的高是4厘米，平行四边形的高是多少厘米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">4 * (1/2)</gadget>
<output>2</output>

<result>2</result>