Test you.((1/2)-(1/3))+((1/3)-(1/4))+((1/4)-(1/5))+…+(( 1/98)-(1/99))=?
考考你.((1/2)-(1/3))+((1/3)-(1/4))+((1/4)-(1/5))+…+((1/98)-(1/99))=？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 99</gadget>
<output>1/99 = around 0.010101</output>

<gadget id="calculator">(1/2) - (1/99)</gadget>
<output>97/198 = around 0.489899</output>

<result>97/198 = around 0.489899</result>