21664536 ÷ 790 
We're looking to find how many times 790 goes into 21664536.

Moving on to step 1:
If we divide 2 by 790, we get 0 and a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 790

On to step 2:
When dividing 21 by 790, we get 0 with a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Include the next digit (6) from the dividend after 21, then repeat: 216 / 790

On to step 3:
The number 790 fits into 216 0 times, leaving a remainder of 216.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 216, we get 216.
Grab the next digit (6) from the dividend, add it to 216, then carry on: 2166 / 790

Advancing to step 4:
790 goes into 2166 2 times with a remainder of 586.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 1580 from 2166 to get 586.
Append the next digit (4) from the dividend to 586 and continue with: 5864 / 790

Step 5:
If we divide 5864 by 790, we get 7 and a remainder of 334.
Use 7 as the next digit of our solution. 
Result so far: 27.0
The remainder is 334 after subtracting 5530 from 5864.
Include the next digit (5) from the dividend after 334, then repeat: 3345 / 790

Going ahead to step 6:
If we divide 3345 by 790, we get 4 and a remainder of 185.
Record the quotient 4 as the next digit in the result. 
Result so far: 274.0
The remainder is 185 after subtracting 3160 from 3345.
Include the next digit (3) from the dividend after 185, then repeat: 1853 / 790

Going ahead to step 7:
If we divide 1853 by 790, we get 2 and a remainder of 273.
The next digit of our result is 2. 
Result so far: 2742.0
Subtract 1580 from 1853 to get 273.
Grab the next digit (6) from the dividend, add it to 273, then carry on: 2736 / 790

On to step 8:
2736 divided by 790 is 3 with a remainder of 366.
The next digit of our result is 3. 
Result so far: 27423.0
Subtract 2370 from 2736 to get 366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

Moving on to step 9:
When dividing 3660 by 790, we get 4 with a remainder of 500.
The next digit of our result is 4. 
Result so far: 27423.4
If we take 3160 away from 3660, we end up with 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5000, and continue the process.

On to step 10:
5000 divided by 790 is 6 with a remainder of 260.
The next digit of our result is 6. 
Result so far: 27423.46
The remainder is 260 after subtracting 4740 from 5000.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Let's proceed to step 11:
790 can be fit into 2600 3 times, resulting in a remainder of 230.
The next digit of our result is 3. 
Result so far: 27423.463
Subtracting 2370 from 2600 leaves us with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

On to step 12:
When dividing 2300 by 790, we get 2 with a remainder of 720.
The number 2 becomes the next digit in our result. 
Result so far: 27423.4632
If we subtract 1580 from 2300, we get 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

On to step 13:
If we divide 7200 by 790, we get 9 and a remainder of 90.
The number 9 becomes the next digit in our result. 
Result so far: 27423.46329
Deduct 7110 from 7200 and we're left with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Advancing to step 14:
When dividing 900 by 790, we get 1 with a remainder of 110.
Record the quotient 1 as the next digit in the result. 
Result so far: 27423.463291
If we take 790 away from 900, we end up with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Advancing to step 15:
When dividing 1100 by 790, we get 1 with a remainder of 310.
Use 1 as the next digit of our solution. 
Result so far: 27423.4632911
The remainder is 310 after subtracting 790 from 1100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3100, and continue the process.

The final result is 27423.4632911 with a remainder of 3.1e-06.