We look at the division of 20921218 by 156 
Our goal is to divide 20921218 by 156.

Going ahead to step 1:
If we divide 2 by 156, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 156

Step 2:
156 goes into 20 0 times with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 20, we get 20.
Fetch the next digit (9) from the dividend, attach it to 20 and continue: 209 / 156

Let's proceed to step 3:
209 divided by 156 is 1 with a remainder of 53.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 156 from 209 and we're left with 53.
Take the next digit (2) from the dividend and append it to 53, then repeat: 532 / 156

Advancing to step 4:
532 divided by 156 is 3 with a remainder of 64.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
If we subtract 468 from 532, we get 64.
Fetch the next digit (1) from the dividend, attach it to 64 and continue: 641 / 156

Going ahead to step 5:
156 can be fit into 641 4 times, resulting in a remainder of 17.
Record the quotient 4 as the next digit in the result. 
Result so far: 134.0
If we subtract 624 from 641, we get 17.
Take the next digit (2) from the dividend and append it to 17, then repeat: 172 / 156

Step 6:
When dividing 172 by 156, we get 1 with a remainder of 16.
Put 1 as the next digit of the answer. 
Result so far: 1341.0
Subtract 156 from 172 to get 16.
Include the next digit (1) from the dividend after 16, then repeat: 161 / 156

On to step 7:
156 can be fit into 161 1 times, resulting in a remainder of 5.
The number 1 becomes the next digit in our result. 
Result so far: 13411.0
Subtracting 156 from 161 leaves us with 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 156

Step 8:
The number 156 fits into 58 0 times, leaving a remainder of 58.
The number 0 becomes the next digit in our result. 
Result so far: 134110.0
The remainder is 58 after subtracting 0 from 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 9:
580 divided by 156 is 3 with a remainder of 112.
Use 3 as the next digit of our solution. 
Result so far: 134110.3
If we subtract 468 from 580, we 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.

Step 10:
The number 156 fits into 1120 7 times, leaving a remainder of 28.
Record the quotient 7 as the next digit in the result. 
Result so far: 134110.37
If we subtract 1092 from 1120, we get 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Going ahead to step 11:
When dividing 280 by 156, we get 1 with a remainder of 124.
The next digit of our result is 1. 
Result so far: 134110.371
If we take 156 away from 280, we end up with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

On to step 12:
1240 divided by 156 is 7 with a remainder of 148.
Write down 7 as next digit of the result. 
Result so far: 134110.3717
The remainder is 148 after subtracting 1092 from 1240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

Moving on to step 13:
If we divide 1480 by 156, we get 9 and a remainder of 76.
The next digit of our result is 9. 
Result so far: 134110.37179
Deduct 1404 from 1480 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Step 14:
156 goes into 760 4 times with a remainder of 136.
The next digit of our result is 4. 
Result so far: 134110.371794
The remainder is 136 after subtracting 624 from 760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1360, and continue the process.

Moving on to step 15:
The number 156 fits into 1360 8 times, leaving a remainder of 112.
Record the quotient 8 as the next digit in the result. 
Result so far: 134110.3717948
If we take 1248 away from 1360, we end up with 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 16:
156 can be fit into 1120 7 times, resulting in a remainder of 28.
The next digit of our result is 7. 
Result so far: 134110.37179487
The remainder is 28 after subtracting 1092 from 1120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The final outcome is 134110.37179487, with a leftover of 2.8e-08.