The circumference of the base of a cylinder is 25.12 cm. Cutting the cylinder in half along its base diameter increases the surface area by 112 cm**2. Find the surface area of the original cylinder.
一个圆柱体的底面周长是25.12cm．沿圆柱体的底面直径将它切成两半，表面积增加了112cm**2．求原来圆柱体的表面积．
<gadget id="calculator">25.12 / 3.14</gadget>
<output>8</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 2</gadget>
<output>100.48</output>

<gadget id="calculator">112 / 2 / 8</gadget>
<output>7</output>

<gadget id="calculator">3.14 * 8 * 7</gadget>
<output>175.84</output>

<gadget id="calculator">100.48 + 175.84</gadget>
<output>276.32</output>

<result>276.32</result>