A cylindrical piece of wood has a circumference of 157 centimeters and a height of 10 centimeters. If it is cut into two parts along the diameter of the base, how many square centimeters will the surface area increase?
一根圆柱形木料，底面周长是157厘米，高10厘米，如果把它沿底面直径截成2部分，表面积增加了多少平方厘米．
<gadget id="calculator">157 / 3.14</gadget>
<output>50</output>

<gadget id="calculator">50 * 10 * 2</gadget>
<output>1_000</output>

<result>1_000</result>