Evaluate
28
Factor
2^{2}\times 7
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7+4+3+4+3+4+3
Add 4 and 3 to get 7.
11+3+4+3+4+3
Add 7 and 4 to get 11.
14+4+3+4+3
Add 11 and 3 to get 14.
18+3+4+3
Add 14 and 4 to get 18.
21+4+3
Add 18 and 3 to get 21.
25+3
Add 21 and 4 to get 25.
28
Add 25 and 3 to get 28.
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