Compute 221_3 + 122_3 + 202_3 + 110_3 in base 3.
2(3)^2 + 2(3) + 1 = 25
1(3)^2 + 2(3) + 2 = 17
2(3)^2 + 0 (3) + 2 = 20
1(3)^2 + 1(3) + 0 = 12
25 + 17 + 20 + 12 = 74
74 / 3 = 24 R 2
24 / 3 = 8 R 0
8 /3 = 2 R 2
2/3 = 0 R 2
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