Multiplying time value by number figure

I need help please in creating a formula for the following purpose:
I need to subtract a fixed time value of 10:00 from a given time value figure (NN:00) from a cell (A1) then multiply the result by 1.5 and then add the 10:00 hours and finally multiply the final result by 1234

Have no clue what your doing, but try this:

If your data is: 00:24:00

=(((A1-TEXT("10:00","mm:ss"))*1.5)+TEXT("10:00","mm:ss"))*1234

If your data is: 24:00:00

=(((A1-TEXT("10:00","hh:mm"))*1.5)+TEXT("10:00","hh:mm"))*1234

Thank you for the formula, let me please clarify more what I am trying to achieve.
I would like to reach the following result on a selected cell other than cell A1 assuming cell A1 has a time value of 36:06

I would like the formula to contain the following values please:
36:06 is variable, depending previously on cell A1 value
Values 10:00, 1.5 and 1234 are fixed.

36:06-10:00=26:06
26:06*1.5=39:15
39:15+10:00=49:15
49:15*1234=60774.5

60774.5 results are what I would like to see on my desire selected cell when inserting the right formula; the number resulted obviously subject to change depending on A1 cell value.

The formula suggested by you gave me a result of 2528.09 instead of 60774.5

I think your maths is a little out

26:06*1.5 = 39:09

given that discrepancy I think the result should be 60651.1 which you can get with this formula

=((A1-"10:00")*24*1.5+10)*1234

If you had that formula in A1 then you'd get a circular reference so I guess the formula should refer to a different cell....anyway working backwards if you get 60674.24 then I reckon that the starting value also has some seconds, i.e.

36:06:45

If the value is formatted as [h]:mm then seconds won't display but they'll be considered when using the value for calculations, do you want that or should seconds be ignored (in which case you might want to round to the nearest minute, 36:07 in this case rather than 36:06)?

You were absolutely right when I reformatted my numbers to show seconds as well It reveal the hidden 45 seconds, How can I please amend this formula =SUM(L2:L57)/12 to ignore the seconds, how the formula should read?

Try this version

=((TEXT(A1,"[h]:mm")-"10:00")*24*1.5+10)*1234