20912644 ÷ 990 
We're looking to find how many times 990 goes into 20912644.

Advancing to step 1:
990 can be fit into 2 0 times, resulting in a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (0) from the dividend, attach it to 2 and continue: 20 / 990

On to step 2:
If we divide 20 by 990, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Append the next digit (9) from the dividend to 20 and continue with: 209 / 990

Step 3:
When dividing 209 by 990, we get 0 with a remainder of 209.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 209 and we're left with 209.
Take the next digit (1) from the dividend and append it to 209, then repeat: 2091 / 990

Moving on to step 4:
990 goes into 2091 2 times with a remainder of 111.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 1980 from 2091 and we're left with 111.
Fetch the next digit (2) from the dividend, attach it to 111 and continue: 1112 / 990

Let's proceed to step 5:
990 can be fit into 1112 1 times, resulting in a remainder of 122.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
The remainder is 122 after subtracting 990 from 1112.
Take the next digit (6) from the dividend and append it to 122, then repeat: 1226 / 990

Advancing to step 6:
When dividing 1226 by 990, we get 1 with a remainder of 236.
Use 1 as the next digit of our solution. 
Result so far: 211.0
If we subtract 990 from 1226, we get 236.
Grab the next digit (4) from the dividend, add it to 236, then carry on: 2364 / 990

On to step 7:
When dividing 2364 by 990, we get 2 with a remainder of 384.
Record the quotient 2 as the next digit in the result. 
Result so far: 2112.0
Deduct 1980 from 2364 and we're left with 384.
Take the next digit (4) from the dividend and append it to 384, then repeat: 3844 / 990

On to step 8:
990 goes into 3844 3 times with a remainder of 874.
Write down 3 as next digit of the result. 
Result so far: 21123.0
Deduct 2970 from 3844 and we're left with 874.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8740, and continue the process.

Step 9:
When dividing 8740 by 990, we get 8 with a remainder of 820.
Record the quotient 8 as the next digit in the result. 
Result so far: 21123.8
If we subtract 7920 from 8740, we get 820.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8200, and continue the process.

On to step 10:
If we divide 8200 by 990, we get 8 and a remainder of 280.
The next digit of our result is 8. 
Result so far: 21123.88
The remainder is 280 after subtracting 7920 from 8200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

The final outcome is 21123.88, with a leftover of 0.28.