If a conical block with a base diameter of 36 cm and a height of 8 cm is divided into two blocks of the same shape and size, what is the cross-sectional area?
一个底面直径是36cm，高是8cm的圆锥形木块，分成形状、大小完全相同的两个木块后，截面的面积是多少？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">36 * 4</gadget>
<output>144</output>

<result>144</result>