Cut a 5-meter-long cylindrical steel into three sections, and the surface area increases by 50.24 square centimeters. What is the original surface area of this cylindrical steel?
将一根长5米的圆柱形钢材截成三段，表面积就增加了50.24平方厘米，这根圆柱形钢材原来的表面积是多少？
<gadget id="calculator">50.24 / 4</gadget>
<output>12.56</output>

<gadget id="calculator">12.56 / 3.14</gadget>
<output>4</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 * 3.14 * 2 * 5</gadget>
<output>62.8</output>

<gadget id="calculator">12.56 * 2</gadget>
<output>25.12</output>

<gadget id="calculator">62.8 + 25.12</gadget>
<output>87.92</output>

<result>87.92</result>