Nothing, you can't cross a vector with a scaler.
OP delivers.
He burned his lips on the exhaust pipe.
A redhead who can tan.
Cross country
Nothing you can't cross a vector with a scaler.
You can't cross a scalar and a vector.
Cliff
Nothing, you can't cross a vector by a scalar. EDIT: changed multiply to cross.
Nothing, you can't cross a scaler with a vector.