If both sides of a right triangle are extended (1/5), the area of the new triangle is greater than the area of the original triangle.
一个直角三角形的两边都延长(1/5)得到的新三角形面积比原来三角形的面积多多少．
<gadget id="calculator">1 / 5</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">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(6/5) * (6/5) * (1/2)</gadget>
<output>18/25 = around 0.72</output>

<gadget id="calculator">1 * 1 * (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(18/25) - (1/2)</gadget>
<output>11/50 = around 0.22</output>

<gadget id="calculator">(11/50) / (1/2)</gadget>
<output>11/25 = around 0.44</output>

<result>11/25 = around 0.44</result>