Calculation: (1/2)+(1/3)+(2/3)+(1/4)+(2/4)+(3/4)+(1/5)+(2/5)+ (3/5)+...+(1/100)+(2/100)+...+(99/100).
计算：(1/2)+(1/3)+(2/3)+(1/4)+(2/4)+(3/4)+(1/5)+(2/5)+(3/5)+…+(1/100)+(2/100)+…+(99/100)．
<result>2_475</result>