We're dividing 6443921 by 911 
We want to figure out the number of times 6443921 can be divided by 911.

Advancing to step 1:
The number 911 fits into 6 0 times, leaving a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 911

Step 2:
64 divided by 911 is 0 with a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Grab the next digit (4) from the dividend, add it to 64, then carry on: 644 / 911

Advancing to step 3:
If we divide 644 by 911, we get 0 and a remainder of 644.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 644 and we're left with 644.
Append the next digit (3) from the dividend to 644 and continue with: 6443 / 911

On to step 4:
6443 divided by 911 is 7 with a remainder of 66.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtracting 6377 from 6443 leaves us with 66.
Append the next digit (9) from the dividend to 66 and continue with: 669 / 911

Advancing to step 5:
911 goes into 669 0 times with a remainder of 669.
The next digit of our result is 0. 
Result so far: 70.0
If we take 0 away from 669, we end up with 669.
Grab the next digit (2) from the dividend, add it to 669, then carry on: 6692 / 911

Let's proceed to step 6:
If we divide 6692 by 911, we get 7 and a remainder of 315.
Put 7 as the next digit of the answer. 
Result so far: 707.0
If we take 6377 away from 6692, we end up with 315.
Include the next digit (1) from the dividend after 315, then repeat: 3151 / 911

Advancing to step 7:
If we divide 3151 by 911, we get 3 and a remainder of 418.
Record the quotient 3 as the next digit in the result. 
Result so far: 7073.0
If we take 2733 away from 3151, we end up with 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Moving on to step 8:
The number 911 fits into 4180 4 times, leaving a remainder of 536.
The number 4 becomes the next digit in our result. 
Result so far: 7073.4
Deduct 3644 from 4180 and we're left with 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Let's proceed to step 9:
If we divide 5360 by 911, we get 5 and a remainder of 805.
Write down 5 as next digit of the result. 
Result so far: 7073.45
Subtracting 4555 from 5360 leaves us with 805.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8050, and continue the process.

Step 10:
911 can be fit into 8050 8 times, resulting in a remainder of 762.
Record the quotient 8 as the next digit in the result. 
Result so far: 7073.458
Subtract 7288 from 8050 to get 762.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7620, and continue the process.

Going ahead to step 11:
If we divide 7620 by 911, we get 8 and a remainder of 332.
Put 8 as the next digit of the answer. 
Result so far: 7073.4588
Deduct 7288 from 7620 and we're left with 332.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

The final outcome is 7073.4588, with a leftover of 0.00332.