Calculation: (1/2)+(2/(2*3))+(3/(2*3*4))+(4/(2*3*4*5))+(5/(2* 3*4*5*6)).
计算：(1/2)+(2/(2*3))+(3/(2*3*4))+(4/(2*3*4*5))+(5/(2*3*4*5*6))．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">2 / 6</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 * 3 * 4</gadget>
<output>24</output>

<gadget id="calculator">3 / 24</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">2 * 3 * 4 * 5</gadget>
<output>120</output>

<gadget id="calculator">4 / 120</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">2 * 3 * 4 * 5 * 6</gadget>
<output>720</output>

<gadget id="calculator">5 / 720</gadget>
<output>1/144 = around 0.006944</output>

<gadget id="calculator">(1/2) + (1/3) + (1/8) + (1/30) + (1/144)</gadget>
<output>719/720 = around 0.998611</output>

<result>719/720 = around 0.998611</result>