Cut a cylindrical iron block into the largest cone, the volume is reduced by 120cm**3, find the volume of the original cylindrical iron block, what is the formula
把一个圆柱形的铁块，切削成一个最大的圆锥，体积减少120cm**3，求原来圆柱铁块的体积，列式计算是多少
<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">120 / (2/3)</gadget>
<output>180</output>

<result>180</result>