3904058 ÷ 686 
We want to figure out the number of times 3904058 can be divided by 686.

Step 1:
686 can be fit into 3 0 times, resulting in a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 686

Going ahead to step 2:
686 can be fit into 39 0 times, resulting in a remainder of 39.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 39, we end up with 39.
Grab the next digit (0) from the dividend, add it to 39, then carry on: 390 / 686

Step 3:
686 can be fit into 390 0 times, resulting in a remainder of 390.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 390 and we're left with 390.
Grab the next digit (4) from the dividend, add it to 390, then carry on: 3904 / 686

Going ahead to step 4:
686 can be fit into 3904 5 times, resulting in a remainder of 474.
Write down 5 as next digit of the result. 
Result so far: 5.0
The remainder is 474 after subtracting 3430 from 3904.
Take the next digit (0) from the dividend and append it to 474, then repeat: 4740 / 686

Going ahead to step 5:
When dividing 4740 by 686, we get 6 with a remainder of 624.
The next digit of our result is 6. 
Result so far: 56.0
If we take 4116 away from 4740, we end up with 624.
Append the next digit (5) from the dividend to 624 and continue with: 6245 / 686

Let's proceed to step 6:
686 can be fit into 6245 9 times, resulting in a remainder of 71.
Record the quotient 9 as the next digit in the result. 
Result so far: 569.0
If we subtract 6174 from 6245, we get 71.
Append the next digit (8) from the dividend to 71 and continue with: 718 / 686

Let's proceed to step 7:
718 divided by 686 is 1 with a remainder of 32.
The number 1 becomes the next digit in our result. 
Result so far: 5691.0
Deduct 686 from 718 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 8:
686 can be fit into 320 0 times, resulting in a remainder of 320.
Write down 0 as next digit of the result. 
Result so far: 5691.0
Deduct 0 from 320 and we're left with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Going ahead to step 9:
The number 686 fits into 3200 4 times, leaving a remainder of 456.
The number 4 becomes the next digit in our result. 
Result so far: 5691.04
If we subtract 2744 from 3200, we get 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Let's proceed to step 10:
The number 686 fits into 4560 6 times, leaving a remainder of 444.
Record the quotient 6 as the next digit in the result. 
Result so far: 5691.046
The remainder is 444 after subtracting 4116 from 4560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Going ahead to step 11:
686 goes into 4440 6 times with a remainder of 324.
Put 6 as the next digit of the answer. 
Result so far: 5691.0466
Deduct 4116 from 4440 and we're left with 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

After the division, we end up with 5691.0466 and a remainder of 0.00324.