56131993 ÷ 421 
We want to figure out the number of times 56131993 can be divided by 421.

Let's proceed to step 1:
421 goes into 5 0 times with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Fetch the next digit (6) from the dividend, attach it to 5 and continue: 56 / 421

Going ahead to step 2:
421 can be fit into 56 0 times, resulting in a remainder of 56.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 56 to get 56.
Bring next digit (1) of the dividend behind the 56 and repeat the process: 561 / 421

Advancing to step 3:
421 can be fit into 561 1 times, resulting in a remainder of 140.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 421 from 561 to get 140.
Fetch the next digit (3) from the dividend, attach it to 140 and continue: 1403 / 421

Going ahead to step 4:
The number 421 fits into 1403 3 times, leaving a remainder of 140.
The next digit of our result is 3. 
Result so far: 13.0
Deduct 1263 from 1403 and we're left with 140.
Bring next digit (1) of the dividend behind the 140 and repeat the process: 1401 / 421

Moving on to step 5:
421 can be fit into 1401 3 times, resulting in a remainder of 138.
Write down 3 as next digit of the result. 
Result so far: 133.0
If we take 1263 away from 1401, we end up with 138.
Grab the next digit (9) from the dividend, add it to 138, then carry on: 1389 / 421

On to step 6:
421 goes into 1389 3 times with a remainder of 126.
The number 3 becomes the next digit in our result. 
Result so far: 1333.0
Subtract 1263 from 1389 to get 126.
Include the next digit (9) from the dividend after 126, then repeat: 1269 / 421

Step 7:
1269 divided by 421 is 3 with a remainder of 6.
The next digit of our result is 3. 
Result so far: 13333.0
Subtracting 1263 from 1269 leaves us with 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 421

Going ahead to step 8:
If we divide 63 by 421, we get 0 and a remainder of 63.
The next digit of our result is 0. 
Result so far: 133330.0
If we subtract 0 from 63, we get 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

On to step 9:
If we divide 630 by 421, we get 1 and a remainder of 209.
Record the quotient 1 as the next digit in the result. 
Result so far: 133330.1
Subtracting 421 from 630 leaves us with 209.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Advancing to step 10:
When dividing 2090 by 421, we get 4 with a remainder of 406.
Put 4 as the next digit of the answer. 
Result so far: 133330.14
Subtract 1684 from 2090 to get 406.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

Moving on to step 11:
When dividing 4060 by 421, we get 9 with a remainder of 271.
Use 9 as the next digit of our solution. 
Result so far: 133330.149
The remainder is 271 after subtracting 3789 from 4060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

On to step 12:
2710 divided by 421 is 6 with a remainder of 184.
Put 6 as the next digit of the answer. 
Result so far: 133330.1496
Deduct 2526 from 2710 and we're left with 184.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1840, and continue the process.

Step 13:
421 can be fit into 1840 4 times, resulting in a remainder of 156.
Use 4 as the next digit of our solution. 
Result so far: 133330.14964
The remainder is 156 after subtracting 1684 from 1840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

On to step 14:
The number 421 fits into 1560 3 times, leaving a remainder of 297.
Record the quotient 3 as the next digit in the result. 
Result so far: 133330.149643
If we take 1263 away from 1560, we end up with 297.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2970, and continue the process.

On to step 15:
When dividing 2970 by 421, we get 7 with a remainder of 23.
Record the quotient 7 as the next digit in the result. 
Result so far: 133330.1496437
The remainder is 23 after subtracting 2947 from 2970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 16:
421 can be fit into 230 0 times, resulting in a remainder of 230.
Record the quotient 0 as the next digit in the result. 
Result so far: 133330.1496437
Subtract 0 from 230 to get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

The final result is 133330.1496437 with a remainder of 2.3e-07.