The perimeter and height of the base of a cylindrical wooden stick are equal. If 2 cm is cut off along the horizontal direction, the surface area will be reduced by 12.56 square centimeters. What is the original surface area of this wooden stick?
一根圆柱形木棒底面的周长和高相等，如果沿水平方向锯去2厘米，表面积就减少12.56平方厘米，原来这根木棒的表面积是多少？
<gadget id="calculator">6.28 * 6.28</gadget>
<output>39.4384</output>

<gadget id="calculator">6.28 / 3.14 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 2</gadget>
<output>6.28</output>

<gadget id="calculator">39.4384 + 6.28</gadget>
<output>45.7184</output>

<result>45.7184</result>