There is a cuboid steel ingot, the circumference of the bottom surface is 2 meters, the ratio of length to width is 4:1, and the height is 40% less than the width. It can just be cast into a cone with a height of 6 decimeters. Find the area of the base of the cone.
有一块长方体钢锭，底面周长为2米，长与宽的比是4：1，高比宽少40%．它正好可以铸成高为6分米的圆锥体，求圆锥体的底面积．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">4 + 1</gadget>
<output>5</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

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

<gadget id="calculator">(3/5) / (1/3) / 6</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">2 * 5 * (4/5) * 2 * 5 * (1/5) * 2 * 5 * (1/5) * (3/10)</gadget>
<output>48/5 = around 9.6</output>

<result>48/5 = around 9.6</result>