Convert 300 km/h to m/s please

I'm being an idiot! please help!

1 hour - 3600 s
300km/h = 300000/3600 = 83.33 m/s

1km = 1,000 m
1 hr = 60 min.
60 min. = 60 sec.
convert: 300km x 1000m/1km = 300,000 m
1 hr x 60 min./1 hr. x 60 sec./1 min. = 3600 sec.
solve: 300,000m/3,600sec.= 83.33 m/s