103+50,05:100*0,1

Interpretation: ':' = division, ',' as decimal comma.

Compute: 103 + 50,05 : 100 * 0,1 = 103 + (50,05 / 100) * 0,1 = 103 + 0,5005 * 0,1 = 103 + 0,05005 = 103,05005

So the result is 103,05005 (or 103.05005 in decimal dot notation).