An 80 cm cylindrical steel is cut into 2 equal sections, and the surface area is increased by 60 square centimeters. What is the original volume of this steel in cubic centimeters?
一根80厘米的圆柱形钢材，把它截成相等的2段，表面积增加60平方厘米，这根钢材原来的体积是多少立方厘米．
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">30 * 80</gadget>
<output>2_400</output>

<result>2_400</result>