To solve this expression, we first need to simplify the terms inside the parentheses:
41 kg 120 g - 39 kg 280 g = (41 kg - 39 kg) + (120 g - 280 g) = 2 kg - 160 g = 1 kg 840 g

Now we divide 33 kg 120 kg by the result:
33 kg 120 kg ÷ 1 kg 840 g = (33 kg + 120 kg) ÷ (1 kg + 840 g) = 153 kg ÷ 1840 g

Next, we multiply the result by 86 times the sum:
86 (727 216 + 2018) = 86 729 234 = 62 669 724

Finally, we subtract 181 708 from the previous result to get the final answer:
62 669 724 - 181 708 = 62 487 016

Therefore, the final answer is 62 487 016.