We look at the division of 42596821 by 122 
We want to divide 42596821 by 122.

On to step 1:
122 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 122

Step 2:
122 goes into 42 0 times with a remainder of 42.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 42 after subtracting 0 from 42.
Fetch the next digit (5) from the dividend, attach it to 42 and continue: 425 / 122

Going ahead to step 3:
The number 122 fits into 425 3 times, leaving a remainder of 59.
Put 3 as the next digit of the answer. 
Result so far: 3.0
The remainder is 59 after subtracting 366 from 425.
Take the next digit (9) from the dividend and append it to 59, then repeat: 599 / 122

On to step 4:
The number 122 fits into 599 4 times, leaving a remainder of 111.
The number 4 becomes the next digit in our result. 
Result so far: 34.0
If we subtract 488 from 599, we get 111.
Bring next digit (6) of the dividend behind the 111 and repeat the process: 1116 / 122

Advancing to step 5:
When dividing 1116 by 122, we get 9 with a remainder of 18.
Record the quotient 9 as the next digit in the result. 
Result so far: 349.0
If we subtract 1098 from 1116, we get 18.
Bring next digit (8) of the dividend behind the 18 and repeat the process: 188 / 122

Going ahead to step 6:
The number 122 fits into 188 1 times, leaving a remainder of 66.
Use 1 as the next digit of our solution. 
Result so far: 3491.0
Subtracting 122 from 188 leaves us with 66.
Append the next digit (2) from the dividend to 66 and continue with: 662 / 122

Moving on to step 7:
The number 122 fits into 662 5 times, leaving a remainder of 52.
Put 5 as the next digit of the answer. 
Result so far: 34915.0
If we subtract 610 from 662, we get 52.
Append the next digit (1) from the dividend to 52 and continue with: 521 / 122

Step 8:
122 goes into 521 4 times with a remainder of 33.
The number 4 becomes the next digit in our result. 
Result so far: 349154.0
If we take 488 away from 521, we end up with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 9:
330 divided by 122 is 2 with a remainder of 86.
Put 2 as the next digit of the answer. 
Result so far: 349154.2
If we subtract 244 from 330, we get 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Going ahead to step 10:
860 divided by 122 is 7 with a remainder of 6.
The next digit of our result is 7. 
Result so far: 349154.27
Deduct 854 from 860 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 11:
When dividing 60 by 122, we get 0 with a remainder of 60.
Record the quotient 0 as the next digit in the result. 
Result so far: 349154.27
Deduct 0 from 60 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Going ahead to step 12:
When dividing 600 by 122, we get 4 with a remainder of 112.
Write down 4 as next digit of the result. 
Result so far: 349154.2704
Subtract 488 from 600 to get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Moving on to step 13:
The number 122 fits into 1120 9 times, leaving a remainder of 22.
Put 9 as the next digit of the answer. 
Result so far: 349154.27049
Deduct 1098 from 1120 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 14:
122 can be fit into 220 1 times, resulting in a remainder of 98.
The next digit of our result is 1. 
Result so far: 349154.270491
The remainder is 98 after subtracting 122 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

On to step 15:
If we divide 980 by 122, we get 8 and a remainder of 4.
Record the quotient 8 as the next digit in the result. 
Result so far: 349154.2704918
Subtracting 976 from 980 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 16:
122 goes into 40 0 times with a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 349154.2704918
The remainder is 40 after subtracting 0 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 349154.2704918 and a remainder of 4e-08.