42465179 divided by 21 
Our goal is to divide 42465179 by 21.

Moving on to step 1:
4 divided by 21 is 0 with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 21

Moving on to step 2:
If we divide 42 by 21, we get 2 and a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 42 away from 42, we end up with 0.
Grab the next digit (4) from the dividend, add it to 0, then carry on: 4 / 21

Step 3:
21 can be fit into 4 0 times, resulting in a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 20.0
Deduct 0 from 4 and we're left with 4.
Grab the next digit (6) from the dividend, add it to 4, then carry on: 46 / 21

Let's proceed to step 4:
When dividing 46 by 21, we get 2 with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 202.0
Subtract 42 from 46 to get 4.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 21

Step 5:
21 goes into 45 2 times with a remainder of 3.
Use 2 as the next digit of our solution. 
Result so far: 2022.0
Subtract 42 from 45 to get 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 21

Going ahead to step 6:
21 can be fit into 31 1 times, resulting in a remainder of 10.
The next digit of our result is 1. 
Result so far: 20221.0
Deduct 21 from 31 and we're left with 10.
Include the next digit (7) from the dividend after 10, then repeat: 107 / 21

Let's proceed to step 7:
If we divide 107 by 21, we get 5 and a remainder of 2.
Use 5 as the next digit of our solution. 
Result so far: 202215.0
Deduct 105 from 107 and we're left with 2.
Take the next digit (9) from the dividend and append it to 2, then repeat: 29 / 21

Going ahead to step 8:
If we divide 29 by 21, we get 1 and a remainder of 8.
The next digit of our result is 1. 
Result so far: 2022151.0
The remainder is 8 after subtracting 21 from 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 9:
21 can be fit into 80 3 times, resulting in a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 2022151.3
Subtract 63 from 80 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 10:
When dividing 170 by 21, we get 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 2022151.38
If we take 168 away from 170, we end up with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 11:
When dividing 20 by 21, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 2022151.38
Subtracting 0 from 20 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 12:
If we divide 200 by 21, we get 9 and a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 2022151.3809
Subtracting 189 from 200 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 13:
If we divide 110 by 21, we get 5 and a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 2022151.38095
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 14:
21 goes into 50 2 times with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 2022151.380952
Deduct 42 from 50 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 15:
The number 21 fits into 80 3 times, leaving a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 2022151.3809523
The remainder is 17 after subtracting 63 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 16:
The number 21 fits into 170 8 times, leaving a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 2022151.38095238
Deduct 168 from 170 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 2022151.38095238 with a remainder of 2e-09.