After cutting a cylinder with a diameter and height of 10 cm into an approximate cuboid, the surface area of the cuboid is increased by how many square centimeters compared with the cylinder.
把一个直径和高都是10厘米的圆柱切拼成一个近似的长方体后，长方体的表面积比圆柱体增加了多少平方厘米．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">10 * 5 * 2</gadget>
<output>100</output>

<result>100</result>