If two cylinders with a base area of 3 square centimeters and a height of 5 centimeters are put together to form a new cylinder, the surface area will be reduced by how many square centimeters compared to the original one.
把两个底面积是3平方厘米，高是5厘米的圆柱体拼成一个新的圆柱体后，表面积比原来减少多少平方厘米．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<result>6</result>