5051723 ÷ 421 
We want to figure out the number of times 5051723 can be divided by 421.

Step 1:
The number 421 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (0) from the dividend after 5, then repeat: 50 / 421

Step 2:
421 goes into 50 0 times with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 50 to get 50.
Take the next digit (5) from the dividend and append it to 50, then repeat: 505 / 421

Going ahead to step 3:
When dividing 505 by 421, we get 1 with a remainder of 84.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 421 from 505, we get 84.
Include the next digit (1) from the dividend after 84, then repeat: 841 / 421

Moving on to step 4:
421 goes into 841 1 times with a remainder of 420.
Write down 1 as next digit of the result. 
Result so far: 11.0
Subtracting 421 from 841 leaves us with 420.
Fetch the next digit (7) from the dividend, attach it to 420 and continue: 4207 / 421

Moving on to step 5:
421 goes into 4207 9 times with a remainder of 418.
The next digit of our result is 9. 
Result so far: 119.0
Subtract 3789 from 4207 to get 418.
Include the next digit (2) from the dividend after 418, then repeat: 4182 / 421

On to step 6:
If we divide 4182 by 421, we get 9 and a remainder of 393.
Use 9 as the next digit of our solution. 
Result so far: 1199.0
Deduct 3789 from 4182 and we're left with 393.
Bring next digit (3) of the dividend behind the 393 and repeat the process: 3933 / 421

Advancing to step 7:
421 goes into 3933 9 times with a remainder of 144.
The next digit of our result is 9. 
Result so far: 11999.0
If we subtract 3789 from 3933, we get 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Going ahead to step 8:
1440 divided by 421 is 3 with a remainder of 177.
Put 3 as the next digit of the answer. 
Result so far: 11999.3
Deduct 1263 from 1440 and we're left with 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Moving on to step 9:
When dividing 1770 by 421, we get 4 with a remainder of 86.
The number 4 becomes the next digit in our result. 
Result so far: 11999.34
Subtracting 1684 from 1770 leaves us with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Advancing to step 10:
When dividing 860 by 421, we get 2 with a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 11999.342
Subtract 842 from 860 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 11:
When dividing 180 by 421, we get 0 with a remainder of 180.
The next digit of our result is 0. 
Result so far: 11999.342
Subtract 0 from 180 to get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Step 12:
1800 divided by 421 is 4 with a remainder of 116.
The number 4 becomes the next digit in our result. 
Result so far: 11999.34204
Subtract 1684 from 1800 to get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

Let's proceed to step 13:
421 can be fit into 1160 2 times, resulting in a remainder of 318.
Write down 2 as next digit of the result. 
Result so far: 11999.342042
If we subtract 842 from 1160, we get 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Going ahead to step 14:
421 can be fit into 3180 7 times, resulting in a remainder of 233.
The number 7 becomes the next digit in our result. 
Result so far: 11999.3420427
Subtract 2947 from 3180 to get 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Let's proceed to step 15:
421 can be fit into 2330 5 times, resulting in a remainder of 225.
Use 5 as the next digit of our solution. 
Result so far: 11999.34204275
Subtracting 2105 from 2330 leaves us with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Our division results in 11999.34204275 with a remaining 2.25e-07.