The triangle and the parallelogram have the same area and the same height. The base of the triangle is 4 cm. What is the base of the parallelogram in cm?
三角形和平行四边形的面积相等，高也相等，三角形的底是4cm，平行四边形的底是多少cm．
<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<result>6</result>