find the math product of u and v

u= (6,7)
v= (-3,9)

Could be a dot product (scalar product) or could be a vector product (cross product)

If a dot product then
6*-3 + 7*9 = 45

If a cross product then
i j k
6 7 0
-3 9 0 do determinant

k (6*9 -(7*-3) ) = k (54+21) = 75 in z direction