643914 divided by 73 
Let's see how many times 73 fits into 643914.

Step 1:
6 divided by 73 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 73

Advancing to step 2:
When dividing 64 by 73, we get 0 with a remainder of 64.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Fetch the next digit (3) from the dividend, attach it to 64 and continue: 643 / 73

Let's proceed to step 3:
The number 73 fits into 643 8 times, leaving a remainder of 59.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we subtract 584 from 643, we get 59.
Take the next digit (9) from the dividend and append it to 59, then repeat: 599 / 73

Advancing to step 4:
599 divided by 73 is 8 with a remainder of 15.
The number 8 becomes the next digit in our result. 
Result so far: 88.0
The remainder is 15 after subtracting 584 from 599.
Bring next digit (1) of the dividend behind the 15 and repeat the process: 151 / 73

Advancing to step 5:
The number 73 fits into 151 2 times, leaving a remainder of 5.
The next digit of our result is 2. 
Result so far: 882.0
If we take 146 away from 151, we end up with 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 73

Going ahead to step 6:
73 can be fit into 54 0 times, resulting in a remainder of 54.
Write down 0 as next digit of the result. 
Result so far: 8820.0
Deduct 0 from 54 and we're left with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 7:
If we divide 540 by 73, we get 7 and a remainder of 29.
Use 7 as the next digit of our solution. 
Result so far: 8820.7
If we subtract 511 from 540, we get 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 8:
If we divide 290 by 73, we get 3 and a remainder of 71.
The number 3 becomes the next digit in our result. 
Result so far: 8820.73
The remainder is 71 after subtracting 219 from 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Step 9:
When dividing 710 by 73, we get 9 with a remainder of 53.
The number 9 becomes the next digit in our result. 
Result so far: 8820.739
Deduct 657 from 710 and we're left with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Advancing to step 10:
73 can be fit into 530 7 times, resulting in a remainder of 19.
Write down 7 as next digit of the result. 
Result so far: 8820.7397
If we subtract 511 from 530, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 11:
If we divide 190 by 73, we get 2 and a remainder of 44.
Write down 2 as next digit of the result. 
Result so far: 8820.73972
Subtracting 146 from 190 leaves us 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.

Going ahead to step 12:
440 divided by 73 is 6 with a remainder of 2.
The number 6 becomes the next digit in our result. 
Result so far: 8820.739726
Deduct 438 from 440 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.

Step 13:
The number 73 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 8820.739726
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 14:
73 can be fit into 200 2 times, resulting in a remainder of 54.
The next digit of our result is 2. 
Result so far: 8820.73972602
Subtract 146 from 200 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final result is 8820.73972602 with a remainder of 5.4e-08.