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= 2 ×p×l + 2(p+l) ×Tp
= 2 ×5×3+ 2(5+3)×13
= 30+208
= 238
2,p x l + 2p +2l x 13
2.5 x 3 +2.5 + 2.3 x 13
30 + 16 x 13
30 + 208
238