bore vs stroke

video-bore-vs-stroke-which-one-is-worth-more-power-2020-01-10_18-40-52_344509-960x640.jpg

Wait, what? 3.58 stroke is 90.9mm, ( 1inch being 25.4mm)
(90.9x2)x(7200/60)= 21816m/s
WTH does that mean?
I think they forgot a conversion factor to change mm to meters: so divide by 1000=21.8m/s badaboom. I guess that's why my6014 mm engine, has survived this long,lol, I'm only at 87% yet..........lol.