Cut an 8-meter-long cylindrical steel into four sections, the surface area is increased by 75.36 square centimeters compared to the original one, find the volume of the original steel.
把一根8米长的圆柱形钢材截成四段，表面积比原来增加75.36平方厘米，求原钢材的体积．
<result>100_484</result>