A triangle and a parallelogram have the same area and height, if the base of the triangle is 7 cm, what is the base of the parallelogram in cm?
一个三角形和一个平行四边形的面积相等，高也相等，已知三角形的底是7厘米，则平行四边形的底是多少厘米．
<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<result>7/2 = around 3.5</result>