If the base of a parallelogram is 6 cm and the height is half of the base, what is the area of the parallelogram in square centimeters?
一个平形四边形的底是6厘米，高是底的一半，平行四边形的面积是多少平方厘米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">6 * (1/2)</gadget>
<output>3</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>