We're dividing 30978484 by 686 
Let's see how many times 686 fits into 30978484.

Step 1:
If we divide 3 by 686, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Append the next digit (0) from the dividend to 3 and continue with: 30 / 686

Step 2:
The number 686 fits into 30 0 times, leaving a remainder of 30.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 30 leaves us with 30.
Take the next digit (9) from the dividend and append it to 30, then repeat: 309 / 686

Advancing to step 3:
The number 686 fits into 309 0 times, leaving a remainder of 309.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 309 after subtracting 0 from 309.
Take the next digit (7) from the dividend and append it to 309, then repeat: 3097 / 686

Let's proceed to step 4:
686 can be fit into 3097 4 times, resulting in a remainder of 353.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 2744 from 3097 and we're left with 353.
Fetch the next digit (8) from the dividend, attach it to 353 and continue: 3538 / 686

Let's proceed to step 5:
3538 divided by 686 is 5 with a remainder of 108.
Use 5 as the next digit of our solution. 
Result so far: 45.0
Deduct 3430 from 3538 and we're left with 108.
Append the next digit (4) from the dividend to 108 and continue with: 1084 / 686

Going ahead to step 6:
If we divide 1084 by 686, we get 1 and a remainder of 398.
The next digit of our result is 1. 
Result so far: 451.0
Subtracting 686 from 1084 leaves us with 398.
Include the next digit (8) from the dividend after 398, then repeat: 3988 / 686

On to step 7:
686 can be fit into 3988 5 times, resulting in a remainder of 558.
Record the quotient 5 as the next digit in the result. 
Result so far: 4515.0
If we take 3430 away from 3988, we end up with 558.
Grab the next digit (4) from the dividend, add it to 558, then carry on: 5584 / 686

Advancing to step 8:
686 goes into 5584 8 times with a remainder of 96.
Put 8 as the next digit of the answer. 
Result so far: 45158.0
If we take 5488 away from 5584, we end up with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Advancing to step 9:
If we divide 960 by 686, we get 1 and a remainder of 274.
Write down 1 as next digit of the result. 
Result so far: 45158.1
Deduct 686 from 960 and we're left with 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Going ahead to step 10:
When dividing 2740 by 686, we get 3 with a remainder of 682.
Put 3 as the next digit of the answer. 
Result so far: 45158.13
Subtracting 2058 from 2740 leaves us with 682.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6820, and continue the process.

Moving on to step 11:
6820 divided by 686 is 9 with a remainder of 646.
Record the quotient 9 as the next digit in the result. 
Result so far: 45158.139
The remainder is 646 after subtracting 6174 from 6820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6460, and continue the process.

Advancing to step 12:
686 can be fit into 6460 9 times, resulting in a remainder of 286.
Use 9 as the next digit of our solution. 
Result so far: 45158.1399
If we take 6174 away from 6460, we end up with 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

The quotient of the division is 45158.1399, and the remainder is 0.00286.