The way ElectricPavlov solved the problem is the short way. Here is the long way.
3√1623√2
3√27×63√2
3√273√63√2
33√63√2
33√63√43√23√4
33√6×43√2×4
33√243√8
33√8×33√8
33√83√33√8
3×23√33√8
63√33√8
63√32
33√3
14×4
14×41
44
1
If you mean 8.333...
813 or 253
If you mean 8.333
83331000 or 83331000
4019.213
4019.2113
401921013
4019210×31
4019210×3
200965×3
602885
12057.6
x22+x55=2.5
55x1210+22x1210=2.5
77x1210=2.5
77x=3025
x=302577
x=2757
x=39.285714285714285714...
1hour60minutes=24hoursx
1hour×x=24hours×60minutes
x=1440minutes
2.51.256.75
26.75
200675
827
0.296296296296296...
√144
√122
1222
121
12
2.5d+9.25=3+3.75d
−1.25d+9.25=3
−1.25d=−6.25
d=5