Question 7What numbers should appear on the bottom row? Rows: 3 4 7 2 1 6; 9 2 8 5 7 4; 6 9 7 3 8 5; 6 1 2 7 4 3; 4 7 5 8 2 9; ? ? ? ? ? ?. Give the six digits as one number. Answer with a natural number.