Calculation: ((1(2/3)+2(3/4)+3(4/5)+…+28(29/30))/(3(1/3)+5(2/4)+ 7(3/5)+...+57(28/30))).
计算：((1(2/3)+2(3/4)+3(4/5)+…+28(29/30))/(3(1/3)+5(2/4)+7(3/5)+…+57(28/30)))．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>