399
1) (3+9+9)/7 = 21/7 = 3
2) 399+4 = 403
(4+0+3)/7 = 7/7 = 1
3) 300<399<400
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399
1) (3+9+9)/7 = 21/7 = 3
2) 399+4 = 403
(4+0+3)/7 = 7/7 = 1
3) 300<399<400