(4/3)+(4/9)+(4/27)+(4/81)+(4/243)+(4/729)=how much.
(4/3)+(4/9)+(4/27)+(4/81)+(4/243)+(4/729)=多少．
<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">4 / 27</gadget>
<output>4/27 = around 0.148148</output>

<gadget id="calculator">4 / 81</gadget>
<output>4/81 = around 0.049383</output>

<gadget id="calculator">4 / 243</gadget>
<output>4/243 = around 0.016461</output>

<gadget id="calculator">4 / 729</gadget>
<output>4/729 = around 0.005487</output>

<gadget id="calculator">(4/3) + (4/9) + (4/27) + (4/81) + (4/243) + (4/729)</gadget>
<output>1_456/729 = around 1.997257</output>

<result>1_456/729 = around 1.997257</result>