We're dividing 31359239 by 421 
We want to divide 31359239 by 421.

Step 1:
421 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 421

Let's proceed to step 2:
421 can be fit into 31 0 times, resulting in a remainder of 31.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 31, we get 31.
Bring next digit (3) of the dividend behind the 31 and repeat the process: 313 / 421

Advancing to step 3:
421 goes into 313 0 times with a remainder of 313.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 313 leaves us with 313.
Append the next digit (5) from the dividend to 313 and continue with: 3135 / 421

Step 4:
421 goes into 3135 7 times with a remainder of 188.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Deduct 2947 from 3135 and we're left with 188.
Grab the next digit (9) from the dividend, add it to 188, then carry on: 1889 / 421

Let's proceed to step 5:
1889 divided by 421 is 4 with a remainder of 205.
The number 4 becomes the next digit in our result. 
Result so far: 74.0
Deduct 1684 from 1889 and we're left with 205.
Bring next digit (2) of the dividend behind the 205 and repeat the process: 2052 / 421

On to step 6:
421 goes into 2052 4 times with a remainder of 368.
Write down 4 as next digit of the result. 
Result so far: 744.0
Subtracting 1684 from 2052 leaves us with 368.
Grab the next digit (3) from the dividend, add it to 368, then carry on: 3683 / 421

Advancing to step 7:
3683 divided by 421 is 8 with a remainder of 315.
Put 8 as the next digit of the answer. 
Result so far: 7448.0
Deduct 3368 from 3683 and we're left with 315.
Fetch the next digit (9) from the dividend, attach it to 315 and continue: 3159 / 421

Step 8:
When dividing 3159 by 421, we get 7 with a remainder of 212.
Use 7 as the next digit of our solution. 
Result so far: 74487.0
The remainder is 212 after subtracting 2947 from 3159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Advancing to step 9:
2120 divided by 421 is 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 74487.5
The remainder is 15 after subtracting 2105 from 2120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 10:
150 divided by 421 is 0 with a remainder of 150.
Put 0 as the next digit of the answer. 
Result so far: 74487.5
If we subtract 0 from 150, we get 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Step 11:
The number 421 fits into 1500 3 times, leaving a remainder of 237.
Use 3 as the next digit of our solution. 
Result so far: 74487.503
Subtract 1263 from 1500 to get 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

On to step 12:
2370 divided by 421 is 5 with a remainder of 265.
The next digit of our result is 5. 
Result so far: 74487.5035
Deduct 2105 from 2370 and we're left with 265.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2650, and continue the process.

Step 13:
421 goes into 2650 6 times with a remainder of 124.
Put 6 as the next digit of the answer. 
Result so far: 74487.50356
Deduct 2526 from 2650 and we're left with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Advancing to step 14:
1240 divided by 421 is 2 with a remainder of 398.
The number 2 becomes the next digit in our result. 
Result so far: 74487.503562
The remainder is 398 after subtracting 842 from 1240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3980, and continue the process.

Advancing to step 15:
3980 divided by 421 is 9 with a remainder of 191.
Put 9 as the next digit of the answer. 
Result so far: 74487.5035629
If we take 3789 away from 3980, we end up with 191.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

Going ahead to step 16:
1910 divided by 421 is 4 with a remainder of 226.
The next digit of our result is 4. 
Result so far: 74487.50356294
The remainder is 226 after subtracting 1684 from 1910.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

In conclusion, the division gives 74487.50356294 with a balance of 2.26e-07.