We look at the division of 20837157 by 669 
Let's see how many times 669 fits into 20837157.

Step 1:
2 divided by 669 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 669

Step 2:
669 goes into 20 0 times with a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 20 after subtracting 0 from 20.
Grab the next digit (8) from the dividend, add it to 20, then carry on: 208 / 669

Advancing to step 3:
669 goes into 208 0 times with a remainder of 208.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 208 after subtracting 0 from 208.
Bring next digit (3) of the dividend behind the 208 and repeat the process: 2083 / 669

On to step 4:
669 goes into 2083 3 times with a remainder of 76.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 2007 from 2083 and we're left with 76.
Grab the next digit (7) from the dividend, add it to 76, then carry on: 767 / 669

Advancing to step 5:
669 can be fit into 767 1 times, resulting in a remainder of 98.
The next digit of our result is 1. 
Result so far: 31.0
Subtract 669 from 767 to get 98.
Bring next digit (1) of the dividend behind the 98 and repeat the process: 981 / 669

On to step 6:
The number 669 fits into 981 1 times, leaving a remainder of 312.
The next digit of our result is 1. 
Result so far: 311.0
If we take 669 away from 981, we end up with 312.
Bring next digit (5) of the dividend behind the 312 and repeat the process: 3125 / 669

Advancing to step 7:
669 can be fit into 3125 4 times, resulting in a remainder of 449.
Record the quotient 4 as the next digit in the result. 
Result so far: 3114.0
The remainder is 449 after subtracting 2676 from 3125.
Append the next digit (7) from the dividend to 449 and continue with: 4497 / 669

Going ahead to step 8:
4497 divided by 669 is 6 with a remainder of 483.
Put 6 as the next digit of the answer. 
Result so far: 31146.0
The remainder is 483 after subtracting 4014 from 4497.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4830, and continue the process.

Let's proceed to step 9:
If we divide 4830 by 669, we get 7 and a remainder of 147.
The next digit of our result is 7. 
Result so far: 31146.7
If we take 4683 away from 4830, we end up with 147.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1470, and continue the process.

Advancing to step 10:
When dividing 1470 by 669, we get 2 with a remainder of 132.
Use 2 as the next digit of our solution. 
Result so far: 31146.72
Deduct 1338 from 1470 and we're left with 132.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1320, and continue the process.

Advancing to step 11:
When dividing 1320 by 669, we get 1 with a remainder of 651.
The number 1 becomes the next digit in our result. 
Result so far: 31146.721
Subtracting 669 from 1320 leaves us with 651.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6510, and continue the process.

On to step 12:
The number 669 fits into 6510 9 times, leaving a remainder of 489.
Put 9 as the next digit of the answer. 
Result so far: 31146.7219
Subtract 6021 from 6510 to get 489.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4890, and continue the process.

Let's proceed to step 13:
When dividing 4890 by 669, we get 7 with a remainder of 207.
Record the quotient 7 as the next digit in the result. 
Result so far: 31146.72197
Subtract 4683 from 4890 to get 207.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2070, and continue the process.

On to step 14:
2070 divided by 669 is 3 with a remainder of 63.
The number 3 becomes the next digit in our result. 
Result so far: 31146.721973
Deduct 2007 from 2070 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Moving on to step 15:
When dividing 630 by 669, we get 0 with a remainder of 630.
The next digit of our result is 0. 
Result so far: 31146.721973
Subtract 0 from 630 to get 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

On to step 16:
669 can be fit into 6300 9 times, resulting in a remainder of 279.
Record the quotient 9 as the next digit in the result. 
Result so far: 31146.72197309
The remainder is 279 after subtracting 6021 from 6300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

The final outcome is 31146.72197309, with a leftover of 2.79e-07.