42862454 ÷ 686 
We want to divide 42862454 by 686.

Advancing to step 1:
686 goes into 4 0 times with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 686

Moving on to step 2:
If we divide 42 by 686, we get 0 and a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Append the next digit (8) from the dividend to 42 and continue with: 428 / 686

On to step 3:
686 goes into 428 0 times with a remainder of 428.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 428 to get 428.
Grab the next digit (6) from the dividend, add it to 428, then carry on: 4286 / 686

Moving on to step 4:
4286 divided by 686 is 6 with a remainder of 170.
Write down 6 as next digit of the result. 
Result so far: 6.0
Subtracting 4116 from 4286 leaves us with 170.
Grab the next digit (2) from the dividend, add it to 170, then carry on: 1702 / 686

Moving on to step 5:
If we divide 1702 by 686, we get 2 and a remainder of 330.
Record the quotient 2 as the next digit in the result. 
Result so far: 62.0
Subtract 1372 from 1702 to get 330.
Take the next digit (4) from the dividend and append it to 330, then repeat: 3304 / 686

On to step 6:
When dividing 3304 by 686, we get 4 with a remainder of 560.
Write down 4 as next digit of the result. 
Result so far: 624.0
The remainder is 560 after subtracting 2744 from 3304.
Grab the next digit (5) from the dividend, add it to 560, then carry on: 5605 / 686

Moving on to step 7:
5605 divided by 686 is 8 with a remainder of 117.
The next digit of our result is 8. 
Result so far: 6248.0
If we subtract 5488 from 5605, we get 117.
Grab the next digit (4) from the dividend, add it to 117, then carry on: 1174 / 686

Advancing to step 8:
1174 divided by 686 is 1 with a remainder of 488.
Write down 1 as next digit of the result. 
Result so far: 62481.0
If we subtract 686 from 1174, we get 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Let's proceed to step 9:
The number 686 fits into 4880 7 times, leaving a remainder of 78.
The next digit of our result is 7. 
Result so far: 62481.7
If we subtract 4802 from 4880, we get 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Let's proceed to step 10:
If we divide 780 by 686, we get 1 and a remainder of 94.
The next digit of our result is 1. 
Result so far: 62481.71
Subtracting 686 from 780 leaves us with 94.
Since there are no more digits in the dividend, we add a zero to the remainder making it 940, and continue the process.

On to step 11:
The number 686 fits into 940 1 times, leaving a remainder of 254.
The next digit of our result is 1. 
Result so far: 62481.711
The remainder is 254 after subtracting 686 from 940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

After the division, we end up with 62481.711 and a remainder of 0.0254.