To solve this equation, we will follow the order of operations (PEMDAS - Parentheses, Exponents, Multiplication and Division from left to right, Addition and Subtraction from left to right).

58 90 = 5220
3042 / 70 = 43.457
24 394 = 9456
9456 * 1983 = 18770448

Now we substitute these values back into the equation:

5220 : 43.457 : 606.842 - 476 + 938549 - 375 + 18770448 * 56

Next, we will perform the division:

5220 : 43.457 ≈ 119.97

Finally, we will complete the rest of the operations:

119.97 - 476 + 938549 - 375 + 18770448 56
= -237.03 + 938549 - 375 + 18770448 56
= -237.03 + 938549 - 375 + 1051717568
= 105175836.97

Therefore, the final result is approximately 105,175,837.