A decigram is 1/10 of a gram, or 0.1000 grams or 1.000x10-1 grams. Thus, 10 decigrams = 1.000 gram.
Using the unit-factor method, also referred to as dimensional analysis, you have the following conversions:
8270 kg x 1000. g/kg x 10.00 decigrams/g
In scientific notation, that translates to:
8.270x104 kg x 1.000x103 g/kg x 1.000x101 decigrams/g = 8.270x108 decigrams