1-((101010/202020))**2*((202020/303030))**2*((333033/555055))**2*((555555/777777))**2=how much.
1-((101010/202020))**2*((202020/303030))**2*((333033/555055))**2*((555555/777777))**2=多少．
<gadget id="calculator">101_010 / 202_020</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) ** 2</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">202_020 / 303_030</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(2/3) ** 2</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">333_033 / 555_055</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) ** 2</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">555_555 / 777_777</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">(5/7) ** 2</gadget>
<output>25/49 = around 0.510204</output>

<gadget id="calculator">(1/4) * (4/9) * (9/25) * (25/49)</gadget>
<output>1/49 = around 0.020408</output>

<gadget id="calculator">1 - (1/49)</gadget>
<output>48/49 = around 0.979592</output>

<result>48/49 = around 0.979592</result>