We're dividing 643818 by 26 
We want to divide 643818 by 26.

Step 1:
The number 26 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Include the next digit (4) from the dividend after 6, then repeat: 64 / 26

Step 2:
26 can be fit into 64 2 times, resulting in a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 52 from 64 and we're left with 12.
Fetch the next digit (3) from the dividend, attach it to 12 and continue: 123 / 26

Moving on to step 3:
123 divided by 26 is 4 with a remainder of 19.
Use 4 as the next digit of our solution. 
Result so far: 24.0
If we take 104 away from 123, we end up with 19.
Grab the next digit (8) from the dividend, add it to 19, then carry on: 198 / 26

Moving on to step 4:
The number 26 fits into 198 7 times, leaving a remainder of 16.
Use 7 as the next digit of our solution. 
Result so far: 247.0
Subtract 182 from 198 to get 16.
Append the next digit (1) from the dividend to 16 and continue with: 161 / 26

Moving on to step 5:
If we divide 161 by 26, we get 6 and a remainder of 5.
Put 6 as the next digit of the answer. 
Result so far: 2476.0
The remainder is 5 after subtracting 156 from 161.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 26

Going ahead to step 6:
26 can be fit into 58 2 times, resulting in a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 24762.0
If we take 52 away from 58, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 7:
If we divide 60 by 26, we get 2 and a remainder of 8.
The next digit of our result is 2. 
Result so far: 24762.2
Subtract 52 from 60 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 8:
If we divide 80 by 26, we get 3 and a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 24762.23
Subtract 78 from 80 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 9:
26 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 24762.23
Deduct 0 from 20 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 10:
When dividing 200 by 26, we get 7 with a remainder of 18.
Write down 7 as next digit of the result. 
Result so far: 24762.2307
Subtract 182 from 200 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Going ahead to step 11:
180 divided by 26 is 6 with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 24762.23076
Deduct 156 from 180 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 12:
If we divide 240 by 26, we get 9 and a remainder of 6.
Record the quotient 9 as the next digit in the result. 
Result so far: 24762.230769
If we take 234 away from 240, we end up with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 13:
When dividing 60 by 26, we get 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 24762.2307692
Subtracting 52 from 60 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 14:
80 divided by 26 is 3 with a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 24762.23076923
Deduct 78 from 80 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

In conclusion, the division gives 24762.23076923 with a balance of 2e-09.