18.84÷3.14=6(dm);10-6=4(dm);3.14×( 6 2 )2×2+18.84×4,=3.14×32×2+18.84×4,=3.14×9×2+18.84×4,=56.52+75.36,=131.88(dm2);答:该圆柱的表面积是131.88dm2.故答案为:131.88.