If the edge length of a cube increases by 20%, its volume will increase by how much
一个正方体棱长增加20%，它的体积就增加多少
<gadget id="calculator">1 * 1 * 1</gadget>
<output>1</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">(6/5) * (6/5) * (6/5)</gadget>
<output>216/125 = around 1.728</output>

<gadget id="calculator">(216/125) - 1</gadget>
<output>91/125 = around 0.728</output>

<gadget id="calculator">(91/125) / 1</gadget>
<output>91/125 = around 0.728</output>

<gadget id="calculator">(91/125) * 1 * 1</gadget>
<output>91/125 = around 0.728</output>

<result>91/125 = around 0.728</result>