Postgre floor changes values postgresql

Question

I have the following query

with debug as (
    select kode_toko_dbo 
    , kode_toko_final
    , nama_toko_final
    , concat (point_category,' - ',point) poin_kategori
    , point
    , sum(total_do_qty) total_do_qty
    , sum(case when upper(replace(item_name,' ','')) ~ upper('^.*Classic.*(6|8)') then floor(total_do_qty::numeric /10)
        when upper(kategori_name_l1) = 'RB FASCIA' then (floor(total_do_qty::numeric /10))
        when upper(replace(item_name,' ','')) ~  upper('^.*Classic.*(3|4)\.5') then floor(total_do_qty::numeric /10)
        else 0 end) reward_toko
    from outputnya 
    group by 1,2,3,4,5
    --order by reward_toko desc 
    )
    select kode_toko_dbo 
    , kode_toko_final 
    , nama_toko_final 
    , poin_kategori
    , point
    , total_do_qty
    , reward_toko   
    from debug
    where kode_toko_final  in ('2012000044','2012000044')
    order by reward_toko desc 

it gives the the following results:

When we devide 8417 with 10, it returns 841 which is correct.

When we divide 2950 with 10, it returns 293 which is wrong. It shud returns 295.

How do i resolve this?

when i tried the following query:

select 2950
, floor(2950::numeric / 10)
, floor(2950::numeric / 10) * 4 
limit 5 

it gives me the correct results.

How do i resolve this?