42457813 ÷ 686 
Our goal is to divide 42457813 by 686.

Let's proceed to step 1:
686 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 686

Moving on to step 2:
The number 686 fits into 42 0 times, leaving a remainder of 42.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Include the next digit (4) from the dividend after 42, then repeat: 424 / 686

Let's proceed to step 3:
The number 686 fits into 424 0 times, leaving a remainder of 424.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 424 to get 424.
Append the next digit (5) from the dividend to 424 and continue with: 4245 / 686

On to step 4:
The number 686 fits into 4245 6 times, leaving a remainder of 129.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
Deduct 4116 from 4245 and we're left with 129.
Fetch the next digit (7) from the dividend, attach it to 129 and continue: 1297 / 686

Moving on to step 5:
When dividing 1297 by 686, we get 1 with a remainder of 611.
Use 1 as the next digit of our solution. 
Result so far: 61.0
Deduct 686 from 1297 and we're left with 611.
Bring next digit (8) of the dividend behind the 611 and repeat the process: 6118 / 686

Moving on to step 6:
When dividing 6118 by 686, we get 8 with a remainder of 630.
The next digit of our result is 8. 
Result so far: 618.0
Subtract 5488 from 6118 to get 630.
Take the next digit (1) from the dividend and append it to 630, then repeat: 6301 / 686

Let's proceed to step 7:
The number 686 fits into 6301 9 times, leaving a remainder of 127.
The next digit of our result is 9. 
Result so far: 6189.0
The remainder is 127 after subtracting 6174 from 6301.
Fetch the next digit (3) from the dividend, attach it to 127 and continue: 1273 / 686

Advancing to step 8:
686 goes into 1273 1 times with a remainder of 587.
The number 1 becomes the next digit in our result. 
Result so far: 61891.0
Subtracting 686 from 1273 leaves us with 587.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5870, and continue the process.

Step 9:
The number 686 fits into 5870 8 times, leaving a remainder of 382.
Record the quotient 8 as the next digit in the result. 
Result so far: 61891.8
If we subtract 5488 from 5870, we get 382.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3820, and continue the process.

Let's proceed to step 10:
686 goes into 3820 5 times with a remainder of 390.
Put 5 as the next digit of the answer. 
Result so far: 61891.85
Deduct 3430 from 3820 and we're left with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Going ahead to step 11:
3900 divided by 686 is 5 with a remainder of 470.
Write down 5 as next digit of the result. 
Result so far: 61891.855
The remainder is 470 after subtracting 3430 from 3900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

The quotient of the division is 61891.855, and the remainder is 0.047.