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=2×3
=27× ((27/2) ×3)
=27 × (13.5 × 3)
=27 × 40.5
=
2cm/x = 3cm/27cm
x = 2 x 27/3 (corat-coret 27:3=9)
x = 18
L. = t x l
= 18 x 27
= 486