20690 divided by 51 
We're looking to find how many times 51 goes into 20690.

Moving on to step 1:
51 goes into 2 0 times with a remainder of 2.
The next digit of our result is 0. 
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 / 51

Advancing to step 2:
51 can be fit into 20 0 times, resulting in a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 20, we get 20.
Grab the next digit (6) from the dividend, add it to 20, then carry on: 206 / 51

Moving on to step 3:
51 can be fit into 206 4 times, resulting in a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtracting 204 from 206 leaves us with 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 51

Moving on to step 4:
29 divided by 51 is 0 with a remainder of 29.
Write down 0 as next digit of the result. 
Result so far: 40.0
The remainder is 29 after subtracting 0 from 29.
Grab the next digit (0) from the dividend, add it to 29, then carry on: 290 / 51

Advancing to step 5:
The number 51 fits into 290 5 times, leaving a remainder of 35.
The number 5 becomes the next digit in our result. 
Result so far: 405.0
If we take 255 away from 290, we end up with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 6:
When dividing 350 by 51, we get 6 with a remainder of 44.
The number 6 becomes the next digit in our result. 
Result so far: 405.6
Deduct 306 from 350 and we're left with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

On to step 7:
The number 51 fits into 440 8 times, leaving a remainder of 32.
Put 8 as the next digit of the answer. 
Result so far: 405.68
If we subtract 408 from 440, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

On to step 8:
51 goes into 320 6 times with a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 405.686
If we take 306 away from 320, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 9:
51 goes into 140 2 times with a remainder of 38.
The next digit of our result is 2. 
Result so far: 405.6862
Deduct 102 from 140 and we're left with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 10:
The number 51 fits into 380 7 times, leaving a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 405.68627
Deduct 357 from 380 and we're left with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Going ahead to step 11:
If we divide 230 by 51, we get 4 and a remainder of 26.
Put 4 as the next digit of the answer. 
Result so far: 405.686274
Subtracting 204 from 230 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 12:
260 divided by 51 is 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 405.6862745
Subtracting 255 from 260 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 13:
51 can be fit into 50 0 times, resulting in a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 405.6862745
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

The final outcome is 405.6862745, with a leftover of 5e-08.