(6/(1*7))-(6/(7*13))-(6/(13*19))-…-(6/(97*103)).
(6/(1*7))-(6/(7*13))-(6/(13*19))-…-(6/(97*103))．
<gadget id="calculator">1 / 103</gadget>
<output>1/103 = around 0.009709</output>

<gadget id="calculator">1 - (1/103)</gadget>
<output>102/103 = around 0.990291</output>

<result>102/103 = around 0.990291</result>