No, you are confusing the empty weight of the 737-800 with the mass gross takeoff weight of the 737 max 7.
The correct comparison of MGTW is 174,200 (-800) vs 177,000 (max 7).
Similarly, the -100’s MGTW was 110,000, not 61,994. Also, the only source I can find for the max 10 is 197,900, not 203,000.
Edit: so the plane grew by 80%, not 320%
No, you are confusing the empty weight of the 737-800 with the mass gross takeoff weight of the 737 max 7.
The correct comparison of MGTW is 174,200 (-800) vs 177,000 (max 7).
Similarly, the -100’s MGTW was 110,000, not 61,994. Also, the only source I can find for the max 10 is 197,900, not 203,000.
Edit: so the plane grew by 80%, not 320%