We divide 51909103 by 421
We're looking to find how many times 421 goes into 51909103.

Let's proceed to step 1:
421 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 421

Step 2:
51 divided by 421 is 0 with a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 51 to get 51.
Grab the next digit (9) from the dividend, add it to 51, then carry on: 519 / 421

Let's proceed to step 3:
The number 421 fits into 519 1 times, leaving a remainder of 98.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 98 after subtracting 421 from 519.
Append the next digit (0) from the dividend to 98 and continue with: 980 / 421

Going ahead to step 4:
421 goes into 980 2 times with a remainder of 138.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we take 842 away from 980, we end up with 138.
Take the next digit (9) from the dividend and append it to 138, then repeat: 1389 / 421

Going ahead to step 5:
The number 421 fits into 1389 3 times, leaving a remainder of 126.
Write down 3 as next digit of the result. 
Result so far: 123.0
If we subtract 1263 from 1389, we get 126.
Fetch the next digit (1) from the dividend, attach it to 126 and continue: 1261 / 421

Going ahead to step 6:
If we divide 1261 by 421, we get 2 and a remainder of 419.
Put 2 as the next digit of the answer. 
Result so far: 1232.0
Subtracting 842 from 1261 leaves us with 419.
Take the next digit (0) from the dividend and append it to 419, then repeat: 4190 / 421

Let's proceed to step 7:
4190 divided by 421 is 9 with a remainder of 401.
The next digit of our result is 9. 
Result so far: 12329.0
If we take 3789 away from 4190, we end up with 401.
Grab the next digit (3) from the dividend, add it to 401, then carry on: 4013 / 421

Step 8:
The number 421 fits into 4013 9 times, leaving a remainder of 224.
The next digit of our result is 9. 
Result so far: 123299.0
Subtracting 3789 from 4013 leaves us with 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Advancing to step 9:
2240 divided by 421 is 5 with a remainder of 135.
The number 5 becomes the next digit in our result. 
Result so far: 123299.5
Subtracting 2105 from 2240 leaves us with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Step 10:
The number 421 fits into 1350 3 times, leaving a remainder of 87.
Put 3 as the next digit of the answer. 
Result so far: 123299.53
If we subtract 1263 from 1350, we get 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Going ahead to step 11:
870 divided by 421 is 2 with a remainder of 28.
Write down 2 as next digit of the result. 
Result so far: 123299.532
If we take 842 away from 870, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 12:
If we divide 280 by 421, we get 0 and a remainder of 280.
Record the quotient 0 as the next digit in the result. 
Result so far: 123299.532
Subtract 0 from 280 to get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Step 13:
When dividing 2800 by 421, we get 6 with a remainder of 274.
Use 6 as the next digit of our solution. 
Result so far: 123299.53206
Subtract 2526 from 2800 to get 274.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2740, and continue the process.

Moving on to step 14:
The number 421 fits into 2740 6 times, leaving a remainder of 214.
Put 6 as the next digit of the answer. 
Result so far: 123299.532066
Subtract 2526 from 2740 to get 214.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2140, and continue the process.

In conclusion, the division gives 123299.532066 with a balance of 2.14e-05.