40821138 ÷ 84 
Our goal is to divide 40821138 by 84.

Going ahead to step 1:
When dividing 4 by 84, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 84

Step 2:
If we divide 40 by 84, we get 0 and a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 40, we get 40.
Fetch the next digit (8) from the dividend, attach it to 40 and continue: 408 / 84

Advancing to step 3:
When dividing 408 by 84, we get 4 with a remainder of 72.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 72 after subtracting 336 from 408.
Append the next digit (2) from the dividend to 72 and continue with: 722 / 84

On to step 4:
84 can be fit into 722 8 times, resulting in a remainder of 50.
Record the quotient 8 as the next digit in the result. 
Result so far: 48.0
If we take 672 away from 722, we end up with 50.
Fetch the next digit (1) from the dividend, attach it to 50 and continue: 501 / 84

Let's proceed to step 5:
When dividing 501 by 84, we get 5 with a remainder of 81.
The next digit of our result is 5. 
Result so far: 485.0
The remainder is 81 after subtracting 420 from 501.
Fetch the next digit (1) from the dividend, attach it to 81 and continue: 811 / 84

Moving on to step 6:
The number 84 fits into 811 9 times, leaving a remainder of 55.
Record the quotient 9 as the next digit in the result. 
Result so far: 4859.0
Deduct 756 from 811 and we're left with 55.
Take the next digit (3) from the dividend and append it to 55, then repeat: 553 / 84

Let's proceed to step 7:
84 can be fit into 553 6 times, resulting in a remainder of 49.
The next digit of our result is 6. 
Result so far: 48596.0
If we take 504 away from 553, we end up with 49.
Fetch the next digit (8) from the dividend, attach it to 49 and continue: 498 / 84

Step 8:
When dividing 498 by 84, we get 5 with a remainder of 78.
Use 5 as the next digit of our solution. 
Result so far: 485965.0
If we subtract 420 from 498, 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.

Moving on to step 9:
780 divided by 84 is 9 with a remainder of 24.
Write down 9 as next digit of the result. 
Result so far: 485965.9
The remainder is 24 after subtracting 756 from 780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 10:
The number 84 fits into 240 2 times, leaving a remainder of 72.
The next digit of our result is 2. 
Result so far: 485965.92
If we subtract 168 from 240, we get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Going ahead to step 11:
The number 84 fits into 720 8 times, leaving a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 485965.928
The remainder is 48 after subtracting 672 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 12:
When dividing 480 by 84, we get 5 with a remainder of 60.
Put 5 as the next digit of the answer. 
Result so far: 485965.9285
If we subtract 420 from 480, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 13:
600 divided by 84 is 7 with a remainder of 12.
The next digit of our result is 7. 
Result so far: 485965.92857
Deduct 588 from 600 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 14:
If we divide 120 by 84, we get 1 and a remainder of 36.
Put 1 as the next digit of the answer. 
Result so far: 485965.928571
If we subtract 84 from 120, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 15:
84 goes into 360 4 times with a remainder of 24.
The number 4 becomes the next digit in our result. 
Result so far: 485965.9285714
The remainder is 24 after subtracting 336 from 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 16:
The number 84 fits into 240 2 times, leaving a remainder of 72.
Record the quotient 2 as the next digit in the result. 
Result so far: 485965.92857142
The remainder is 72 after subtracting 168 from 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

After the division, we end up with 485965.92857142 and a remainder of 7.2e-08.