After a cylinder with a length of 9 decimeters is cut into 2 small cylinders, the surface area increases by 2.4 decimeters squared. It is known that each cubic centimeter weighs 8 grams. How many grams does this cylinder have?
把一根长9分米的圆柱切割成2节小圆柱后，表面积增加2.4平方分米，已知每立方厘米重8克，则这根圆柱原来多少克？
<gadget id="calculator">2.4 / 2</gadget>
<output>1.2</output>

<gadget id="calculator">1.2 * 9 * 1_000 * 8</gadget>
<output>86_400</output>

<result>86_400</result>