Question 888878
{{{(matrix(3,3,2,3,0,0,4,9,9,1,0))*(matrix(3,1,2,5,1))=(matrix(3,1,19,29,23))}}}
{{{(matrix(3,1,1,2,3))*(matrix(3,1,19,29,23))=(matrix(1,1,highlight(146)))}}}