sy-fdpos operation

hi Floks,

x_temp-value = 12401.68

round(12400.68) =12402.000

clear x_temp-value .

x_temp-value  = 12402.000

IF x_temp-value CS'.'
                           v_length = sy-fdpos.
                           v_length = v_length - 1.
                           v_numerator = x_temp-value+0(v_length).

V_numerator = 1240

here displayed is the logic used,But i need to get the value 12400

how can i get that.

Can any one help that if i pass the 12402.68 i should get the value as 12400

Regards,

Ranjith.