The height of one pair of opposite sides of a parallelogram is 5 cm, its base is 12 cm, and the length of the other pair of opposite sides is 3 cm, what is the corresponding height in cm?
平行四边形的一组对边的高是5厘米，它的底是12厘米，另一组对边的长是3厘米，它对应的高是多少厘米．
<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<result>20</result>