If a cylinder with a height of 6cm is cut into two equal small cylinders, the surface area will increase by 30cm**2. If such a small cylinder is cut into the largest cone, the volume will be reduced by how many cm**3.
把一个高是6cm的圆柱截成两个相等的小圆柱后，表面积增加30cm**2，把这样的一个小圆柱削成最大的圆锥，体积将减少多少cm**3．
<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">15 / 2</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">6 * (15/2)</gadget>
<output>45</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 * 15 * (1/3)</gadget>
<output>15</output>

<gadget id="calculator">45 - 15</gadget>
<output>30</output>

<result>30</result>