If a cylindrical steel with a base area of 9.42 cm2 and a height of 4 cm is cut into 3 sections (the section is parallel to the base), how many cm2 will the surface area increase? How many
一个底面积是9.42平方厘米，高是4厘米的圆柱形钢材，截成3段(截面与底面平行)后，表面积增加了多少平方厘米？多少
<gadget id="calculator">9.42 * 4</gadget>
<output>37.68</output>

<result>37.68</result>