Let's divide 31310761 by 421
We want to divide 31310761 by 421.

Step 1:
The number 421 fits into 3 0 times, leaving a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 421

Going ahead to step 2:
421 goes into 31 0 times with a remainder of 31.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 31 leaves us with 31.
Grab the next digit (3) from the dividend, add it to 31, then carry on: 313 / 421

Let's proceed to step 3:
421 can be fit into 313 0 times, resulting in a remainder of 313.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 313, we end up with 313.
Fetch the next digit (1) from the dividend, attach it to 313 and continue: 3131 / 421

Advancing to step 4:
3131 divided by 421 is 7 with a remainder of 184.
Use 7 as the next digit of our solution. 
Result so far: 7.0
Subtract 2947 from 3131 to get 184.
Take the next digit (0) from the dividend and append it to 184, then repeat: 1840 / 421

Step 5:
The number 421 fits into 1840 4 times, leaving a remainder of 156.
Use 4 as the next digit of our solution. 
Result so far: 74.0
If we subtract 1684 from 1840, we get 156.
Take the next digit (7) from the dividend and append it to 156, then repeat: 1567 / 421

On to step 6:
The number 421 fits into 1567 3 times, leaving a remainder of 304.
Write down 3 as next digit of the result. 
Result so far: 743.0
The remainder is 304 after subtracting 1263 from 1567.
Take the next digit (6) from the dividend and append it to 304, then repeat: 3046 / 421

On to step 7:
If we divide 3046 by 421, we get 7 and a remainder of 99.
Record the quotient 7 as the next digit in the result. 
Result so far: 7437.0
If we take 2947 away from 3046, we end up with 99.
Grab the next digit (1) from the dividend, add it to 99, then carry on: 991 / 421

On to step 8:
The number 421 fits into 991 2 times, leaving a remainder of 149.
Use 2 as the next digit of our solution. 
Result so far: 74372.0
Subtract 842 from 991 to get 149.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

Let's proceed to step 9:
When dividing 1490 by 421, we get 3 with a remainder of 227.
Write down 3 as next digit of the result. 
Result so far: 74372.3
Subtract 1263 from 1490 to get 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Let's proceed to step 10:
The number 421 fits into 2270 5 times, leaving a remainder of 165.
The next digit of our result is 5. 
Result so far: 74372.35
Subtract 2105 from 2270 to get 165.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1650, and continue the process.

Going ahead to step 11:
When dividing 1650 by 421, we get 3 with a remainder of 387.
Use 3 as the next digit of our solution. 
Result so far: 74372.353
If we take 1263 away from 1650, we end up with 387.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3870, and continue the process.

Advancing to step 12:
The number 421 fits into 3870 9 times, leaving a remainder of 81.
Use 9 as the next digit of our solution. 
Result so far: 74372.3539
If we subtract 3789 from 3870, we get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

On to step 13:
The number 421 fits into 810 1 times, leaving a remainder of 389.
Put 1 as the next digit of the answer. 
Result so far: 74372.35391
Subtract 421 from 810 to get 389.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3890, and continue the process.

Moving on to step 14:
If we divide 3890 by 421, we get 9 and a remainder of 101.
Use 9 as the next digit of our solution. 
Result so far: 74372.353919
Subtracting 3789 from 3890 leaves us with 101.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1010, and continue the process.

Step 15:
The number 421 fits into 1010 2 times, leaving a remainder of 168.
The next digit of our result is 2. 
Result so far: 74372.3539192
Deduct 842 from 1010 and we're left with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Going ahead to step 16:
When dividing 1680 by 421, we get 3 with a remainder of 417.
Use 3 as the next digit of our solution. 
Result so far: 74372.35391923
Deduct 1263 from 1680 and we're left with 417.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4170, and continue the process.

The final result is 74372.35391923 with a remainder of 4.17e-07.