Calculation: (1/(2*3))+(1/(3*4))+(1/(4*5))+(1/(5*6))+(1/(6*7) )+...+(1/(62*63))=how much.
计算：(1/(2*3))+(1/(3*4))+(1/(4*5))+(1/(5*6))+(1/(6*7))+…+(1/(62*63))=多少．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 63</gadget>
<output>1/63 = around 0.015873</output>

<gadget id="calculator">(1/2) - (1/63)</gadget>
<output>61/126 = around 0.484127</output>

<result>61/126 = around 0.484127</result>