Cut a piece of cylindrical steel with a height of 6 decimeters and a bottom diameter of 4 decimeters into the largest cone. After melting the cut part, how many such cones can be made. (loss not counted)
把一段高是6分米，底面直径是4分米的圆柱体钢材切削成一个最大的圆锥，把切削的部分熔化后，还可以做成多少个这样的圆锥．(损耗不计)
<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">(2/3) / (1/3)</gadget>
<output>2</output>

<result>2</result>