50921790 ÷ 421 
Our goal is to divide 50921790 by 421.

Advancing to step 1:
5 divided by 421 is 0 with a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 421

Advancing to step 2:
If we divide 50 by 421, we get 0 and a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 50 and we're left with 50.
Grab the next digit (9) from the dividend, add it to 50, then carry on: 509 / 421

On to step 3:
509 divided by 421 is 1 with a remainder of 88.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 88 after subtracting 421 from 509.
Fetch the next digit (2) from the dividend, attach it to 88 and continue: 882 / 421

Step 4:
If we divide 882 by 421, we get 2 and a remainder of 40.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
Deduct 842 from 882 and we're left with 40.
Fetch the next digit (1) from the dividend, attach it to 40 and continue: 401 / 421

Let's proceed to step 5:
If we divide 401 by 421, we get 0 and a remainder of 401.
Write down 0 as next digit of the result. 
Result so far: 120.0
Deduct 0 from 401 and we're left with 401.
Bring next digit (7) of the dividend behind the 401 and repeat the process: 4017 / 421

Let's proceed to step 6:
When dividing 4017 by 421, we get 9 with a remainder of 228.
Write down 9 as next digit of the result. 
Result so far: 1209.0
If we subtract 3789 from 4017, we get 228.
Grab the next digit (9) from the dividend, add it to 228, then carry on: 2289 / 421

Advancing to step 7:
2289 divided by 421 is 5 with a remainder of 184.
Write down 5 as next digit of the result. 
Result so far: 12095.0
Deduct 2105 from 2289 and we're left with 184.
Fetch the next digit (0) from the dividend, attach it to 184 and continue: 1840 / 421

Step 8:
1840 divided by 421 is 4 with a remainder of 156.
Record the quotient 4 as the next digit in the result. 
Result so far: 120954.0
Deduct 1684 from 1840 and we're left with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Step 9:
If we divide 1560 by 421, we get 3 and a remainder of 297.
The next digit of our result is 3. 
Result so far: 120954.3
If we subtract 1263 from 1560, we get 297.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2970, and continue the process.

Let's proceed to step 10:
421 goes into 2970 7 times with a remainder of 23.
Use 7 as the next digit of our solution. 
Result so far: 120954.37
If we subtract 2947 from 2970, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Step 11:
230 divided by 421 is 0 with a remainder of 230.
Record the quotient 0 as the next digit in the result. 
Result so far: 120954.37
The remainder is 230 after subtracting 0 from 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Let's proceed to step 12:
2300 divided by 421 is 5 with a remainder of 195.
The number 5 becomes the next digit in our result. 
Result so far: 120954.3705
If we subtract 2105 from 2300, we get 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Going ahead to step 13:
The number 421 fits into 1950 4 times, leaving a remainder of 266.
Put 4 as the next digit of the answer. 
Result so far: 120954.37054
If we take 1684 away from 1950, we end up with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Advancing to step 14:
The number 421 fits into 2660 6 times, leaving a remainder of 134.
Write down 6 as next digit of the result. 
Result so far: 120954.370546
Subtracting 2526 from 2660 leaves us with 134.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Advancing to step 15:
When dividing 1340 by 421, we get 3 with a remainder of 77.
Use 3 as the next digit of our solution. 
Result so far: 120954.3705463
Subtracting 1263 from 1340 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

On to step 16:
When dividing 770 by 421, we get 1 with a remainder of 349.
The number 1 becomes the next digit in our result. 
Result so far: 120954.37054631
Deduct 421 from 770 and we're left with 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

The final outcome is 120954.37054631, with a leftover of 3.49e-07.