((2**2)/(2**2-1))*((3**2)/(3**2-1))*((4**2)/(4**2- 1))*((5**2)/(5**2-1)).
((2**2)/(2**2-1))*((3**2)/(3**2-1))*((4**2)/(4**2-1))*((5**2)/(5**2-1))．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">9 / 8</gadget>
<output>9/8 = around 1.125</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">16 - 1</gadget>
<output>15</output>

<gadget id="calculator">16 / 15</gadget>
<output>16/15 = around 1.066667</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">25 - 1</gadget>
<output>24</output>

<gadget id="calculator">25 / 24</gadget>
<output>25/24 = around 1.041667</output>

<gadget id="calculator">(4/3) * (9/8) * (16/15) * (25/24)</gadget>
<output>5/3 = around 1.666667</output>

<result>5/3 = around 1.666667</result>