A cylinder is first cut into two small cylinders along the direction parallel to the bottom surface, and the surface area is found to increase by 31.4 square centimeters. Then along the height, the two small cylinders are cut into two half cylinders, and the surface area increases by 80 square centimeters. So what is the surface area of the original cylinder in square centimeters?
一个圆柱体，先沿着与底面平行的方向把它截成两个小圆柱，发现表面积增加31.4平方厘米．再沿着高，把这两个小圆柱分别截成两个半圆柱，这时表面积又增加了80平方厘米．那么原来圆柱体的表面积是多少平方厘米？
<gadget id="calculator">80 / 2 / 2</gadget>
<output>20</output>

<gadget id="calculator">6.28 * 20</gadget>
<output>125.6</output>

<gadget id="calculator">31.4 + 125.6</gadget>
<output>157</output>

<result>157</result>