A piece of round steel is cut into a largest cone, the cut part weighs 10 kg, what is the weight of this piece of round steel in kg?
把一段圆钢削成一个最大圆锥，削去部分重10千克，这段圆钢重多少千克．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

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

<result>15</result>