Can you explain the cross multiplication in detail? I didn't see where the numbers come from. Thank you!

5. (12 pts) (a) Dr Quan is vacationing in the Bahamas during the winter break, and wants to find out how quickly he is rotating in a whirlpool modeled by F(x, y, z) = (et sin(y), 23 cos?(y), (x2 + 2 + 2 2)?). He is located at the point (1, 0, 1). Find the axis and magnitude of rotation of the whirlpool at that point. Given by V X F ( 1, 0, 1 ) K VF = 2x ay a2 = (2(24 ) ( x 2 +y 2 +22) - 32 " Cos(y), 1 exsincy ) z'cos ly ) ( x 2 + y 2 +7 2 ) 2 - 2(2x) ( x2 4y2+2 2 ) - 0, 0 - excosly) > VF ( 1 , 0, 1 ) = 60 - 3( 1) cos ( 0), - 2( 2(1) ) ( 12 + 02 + 12 ) - e - cosco ) > = + Axis of rotation 1/ VF(1,0, 1)1 = 19+ 64+ p2/4 Magnitude