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Saya bingung di bagian lebarnya, dan akhirnya semua tanda " saya jadikan 3cm
p = 7cm
l = 11,5cm
L = 7 × 11,5 × 200 × 200
L = 3.220.000 cm^2
L = 322 m^2
Kalau saya sih tadi mengerjakannya begini, maaf kalau salah