The answer is 283829313617.

First, perform multiplication and division:
1 + (1×999999999) + (777778777 ÷ 1) + 283828293838
1 + 999999999 + 777778777 + 283828293838
Now, perform addition:
999999999 + 777778777 = 1777777776
1 + 1777777776 = 1777777777
Finally, add the result to 283828293838:
1777777777 + 283828293838 = 283829313615

Therefore, the final answer is 283829313617.