55132375 divided by 646 
We want to figure out the number of times 55132375 can be divided by 646.

Going ahead to step 1:
When dividing 5 by 646, we get 0 with a remainder of 5.
The number 0 becomes the next digit in our 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 / 646

Moving on to step 2:
The number 646 fits into 55 0 times, leaving a remainder of 55.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 55, we get 55.
Append the next digit (1) from the dividend to 55 and continue with: 551 / 646

Let's proceed to step 3:
551 divided by 646 is 0 with a remainder of 551.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 551 and we're left with 551.
Take the next digit (3) from the dividend and append it to 551, then repeat: 5513 / 646

Going ahead to step 4:
The number 646 fits into 5513 8 times, leaving a remainder of 345.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we subtract 5168 from 5513, we get 345.
Take the next digit (2) from the dividend and append it to 345, then repeat: 3452 / 646

Advancing to step 5:
When dividing 3452 by 646, we get 5 with a remainder of 222.
Put 5 as the next digit of the answer. 
Result so far: 85.0
If we subtract 3230 from 3452, we get 222.
Bring next digit (3) of the dividend behind the 222 and repeat the process: 2223 / 646

Step 6:
646 goes into 2223 3 times with a remainder of 285.
The next digit of our result is 3. 
Result so far: 853.0
Subtracting 1938 from 2223 leaves us with 285.
Bring next digit (7) of the dividend behind the 285 and repeat the process: 2857 / 646

Step 7:
When dividing 2857 by 646, we get 4 with a remainder of 273.
Put 4 as the next digit of the answer. 
Result so far: 8534.0
Deduct 2584 from 2857 and we're left with 273.
Fetch the next digit (5) from the dividend, attach it to 273 and continue: 2735 / 646

Going ahead to step 8:
If we divide 2735 by 646, we get 4 and a remainder of 151.
Write down 4 as next digit of the result. 
Result so far: 85344.0
Subtracting 2584 from 2735 leaves us with 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

On to step 9:
646 goes into 1510 2 times with a remainder of 218.
Record the quotient 2 as the next digit in the result. 
Result so far: 85344.2
Deduct 1292 from 1510 and we're left with 218.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2180, and continue the process.

Let's proceed to step 10:
If we divide 2180 by 646, we get 3 and a remainder of 242.
The number 3 becomes the next digit in our result. 
Result so far: 85344.23
If we subtract 1938 from 2180, we get 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

On to step 11:
2420 divided by 646 is 3 with a remainder of 482.
Record the quotient 3 as the next digit in the result. 
Result so far: 85344.233
Subtracting 1938 from 2420 leaves us with 482.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4820, and continue the process.

After the division, we end up with 85344.233 and a remainder of 0.0482.