If two cylindrical steels with the same base area of 1.5m are put together to form a cylindrical steel, the surface area is reduced by 0.8dm**2. If the mass of steel per cubic decimeter is 7.8kg, what is the mass of the assembled steel? kilogram?
把两根底面积相等的1.5m的圆柱形钢材拼成一根圆柱形钢材，表面积减少0.8dm**2，如果每立方分米的钢材的质量为7.8kg，拼成的这根钢材的质量为多少千克？
<gadget id="calculator">0.4 * 1.5 * 10 * 2 * 7.8</gadget>
<output>93.6</output>

<result>93.6</result>