I had a physics teacher that used to tell us: vache + mouton = la honte which translates to cow + sheep = shame point being, if you add up things th

I had a physics teacher that used to tell us: vache + mouton = la honte which translates to cow + sheep = shame point being, if you add up things that don't match, i.e. do not have the same unit/dimension, you should expect some weird mistakes.