31212457 divided by 836 
We want to figure out the number of times 31212457 can be divided by 836.

Advancing to step 1:
836 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 836

Going ahead to step 2:
If we divide 31 by 836, we get 0 and a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 31, we end up with 31.
Append the next digit (2) from the dividend to 31 and continue with: 312 / 836

Step 3:
When dividing 312 by 836, we get 0 with a remainder of 312.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 312 leaves us with 312.
Take the next digit (1) from the dividend and append it to 312, then repeat: 3121 / 836

Step 4:
If we divide 3121 by 836, we get 3 and a remainder of 613.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 2508 from 3121, we get 613.
Append the next digit (2) from the dividend to 613 and continue with: 6132 / 836

Step 5:
The number 836 fits into 6132 7 times, leaving a remainder of 280.
The next digit of our result is 7. 
Result so far: 37.0
Deduct 5852 from 6132 and we're left with 280.
Append the next digit (4) from the dividend to 280 and continue with: 2804 / 836

Moving on to step 6:
836 goes into 2804 3 times with a remainder of 296.
Use 3 as the next digit of our solution. 
Result so far: 373.0
The remainder is 296 after subtracting 2508 from 2804.
Bring next digit (5) of the dividend behind the 296 and repeat the process: 2965 / 836

Step 7:
When dividing 2965 by 836, we get 3 with a remainder of 457.
Write down 3 as next digit of the result. 
Result so far: 3733.0
Subtracting 2508 from 2965 leaves us with 457.
Append the next digit (7) from the dividend to 457 and continue with: 4577 / 836

Going ahead to step 8:
4577 divided by 836 is 5 with a remainder of 397.
The number 5 becomes the next digit in our result. 
Result so far: 37335.0
Deduct 4180 from 4577 and we're left with 397.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3970, and continue the process.

Advancing to step 9:
When dividing 3970 by 836, we get 4 with a remainder of 626.
The number 4 becomes the next digit in our result. 
Result so far: 37335.4
Deduct 3344 from 3970 and we're left with 626.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6260, and continue the process.

Advancing to step 10:
6260 divided by 836 is 7 with a remainder of 408.
The next digit of our result is 7. 
Result so far: 37335.47
Subtracting 5852 from 6260 leaves us with 408.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4080, and continue the process.

Advancing to step 11:
When dividing 4080 by 836, we get 4 with a remainder of 736.
The next digit of our result is 4. 
Result so far: 37335.474
Deduct 3344 from 4080 and we're left with 736.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7360, and continue the process.

Going ahead to step 12:
836 can be fit into 7360 8 times, resulting in a remainder of 672.
Record the quotient 8 as the next digit in the result. 
Result so far: 37335.4748
Subtract 6688 from 7360 to get 672.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6720, and continue the process.

Advancing to step 13:
836 can be fit into 6720 8 times, resulting in a remainder of 32.
The next digit of our result is 8. 
Result so far: 37335.47488
If we subtract 6688 from 6720, we get 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final result is 37335.47488 with a remainder of 3.2e-05.