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7.776 = 108L
L = 7.776 / 108
L = 72 meter
perbandingan panjang dan lebar :
108 : 72
= 3 : 2
perbandingan lebar dan keliling :
72 : (72 + 72 + 108 + 108)
= 72 : 360
= 1 : 5