old_contents: M = [[1, 4],
  	[1, 3]]
  
  N = [[4, 3],
  	[0, -1]]
  
  l=range;m=len;r=[([sum([M[i][k]*N[k][j]for k in l(m(N))])for j in l(m(N[0]))])for i in l(m(M))];print(r)
  
new_contents: M=[[1,2]];N=[[3],[4]];l=range;m=len;r=[([sum([M[i][k]*N[k][j]for k in l(m(N))])for j in l(m(N[0]))])for i in l(m(M))];print(r)
  
subject: Update main.py