Let's divide 55910000 by 643
We want to divide 55910000 by 643.

Let's proceed to step 1:
643 goes into 5 0 times with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Fetch the next digit (5) from the dividend, attach it to 5 and continue: 55 / 643

Moving on to step 2:
The number 643 fits into 55 0 times, leaving a remainder of 55.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 55 and we're left with 55.
Include the next digit (9) from the dividend after 55, then repeat: 559 / 643

Going ahead to step 3:
When dividing 559 by 643, we get 0 with a remainder of 559.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 559, we get 559.
Append the next digit (1) from the dividend to 559 and continue with: 5591 / 643

Going ahead to step 4:
When dividing 5591 by 643, we get 8 with a remainder of 447.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Deduct 5144 from 5591 and we're left with 447.
Grab the next digit (0) from the dividend, add it to 447, then carry on: 4470 / 643

Let's proceed to step 5:
When dividing 4470 by 643, we get 6 with a remainder of 612.
Put 6 as the next digit of the answer. 
Result so far: 86.0
If we subtract 3858 from 4470, we get 612.
Fetch the next digit (0) from the dividend, attach it to 612 and continue: 6120 / 643

Let's proceed to step 6:
If we divide 6120 by 643, we get 9 and a remainder of 333.
The next digit of our result is 9. 
Result so far: 869.0
Subtract 5787 from 6120 to get 333.
Take the next digit (0) from the dividend and append it to 333, then repeat: 3330 / 643

On to step 7:
643 goes into 3330 5 times with a remainder of 115.
Use 5 as the next digit of our solution. 
Result so far: 8695.0
Subtract 3215 from 3330 to get 115.
Fetch the next digit (0) from the dividend, attach it to 115 and continue: 1150 / 643

Moving on to step 8:
643 can be fit into 1150 1 times, resulting in a remainder of 507.
The next digit of our result is 1. 
Result so far: 86951.0
If we subtract 643 from 1150, we get 507.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5070, and continue the process.

Step 9:
5070 divided by 643 is 7 with a remainder of 569.
The number 7 becomes the next digit in our result. 
Result so far: 86951.7
Subtracting 4501 from 5070 leaves us with 569.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5690, and continue the process.

Moving on to step 10:
The number 643 fits into 5690 8 times, leaving a remainder of 546.
Write down 8 as next digit of the result. 
Result so far: 86951.78
If we subtract 5144 from 5690, we get 546.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5460, and continue the process.

On to step 11:
5460 divided by 643 is 8 with a remainder of 316.
The number 8 becomes the next digit in our result. 
Result so far: 86951.788
Subtract 5144 from 5460 to get 316.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3160, and continue the process.

After the division, we end up with 86951.788 and a remainder of 0.0316.