A section of cylindrical steel is made into the largest cone, and the cut part weighs 10 kg. How many kilograms does this piece of round steel weigh?
把一段圆柱形钢料制成一个最大的圆锥，削去部分重10千克．这段圆钢重多少千克
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">10 / (2/3)</gadget>
<output>15</output>

<result>15</result>