[질문] 벡터의곱셈알려주세요ㅋㅋ

백터a=(x1,y1,z1),b=(x2,y2,z2),c=(x3,y3,z3) 라고하면,bxc=(y2z3-y3z2,z2x3-z3x2,x2y3-x3y2) ax(bxc)=(x2(y1y3+z1z3)-x3(y1y2=z1z2),y2(z1z3+x1x3)-y3(z1z2+x1x