The Milky way is 70000 light-years in diameter. How many years does it take to fly at 800 kilometers per hour

The Milky way is 70000 light-years in diameter. How many years does it take to fly at 800 kilometers per hour

∵1l.y.=9460528404879358.8126m
∴70000l.y.=662236988341555116882m
It will take about 2267934871580 years
It looks like the Milky way is 100000 light-years in diameter