31154210 ÷ 804 
Our goal is to divide 31154210 by 804.

On to step 1:
When dividing 3 by 804, we get 0 with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 3, we end up with 3.
Grab the next digit (1) from the dividend, add it to 3, then carry on: 31 / 804

Moving on to step 2:
804 can be fit into 31 0 times, resulting in a remainder of 31.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 31 leaves us with 31.
Grab the next digit (1) from the dividend, add it to 31, then carry on: 311 / 804

Advancing to step 3:
804 can be fit into 311 0 times, resulting in a remainder of 311.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 311 leaves us with 311.
Take the next digit (5) from the dividend and append it to 311, then repeat: 3115 / 804

Going ahead to step 4:
When dividing 3115 by 804, we get 3 with a remainder of 703.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 703 after subtracting 2412 from 3115.
Bring next digit (4) of the dividend behind the 703 and repeat the process: 7034 / 804

Let's proceed to step 5:
7034 divided by 804 is 8 with a remainder of 602.
Write down 8 as next digit of the result. 
Result so far: 38.0
The remainder is 602 after subtracting 6432 from 7034.
Grab the next digit (2) from the dividend, add it to 602, then carry on: 6022 / 804

Step 6:
804 can be fit into 6022 7 times, resulting in a remainder of 394.
Record the quotient 7 as the next digit in the result. 
Result so far: 387.0
Deduct 5628 from 6022 and we're left with 394.
Append the next digit (1) from the dividend to 394 and continue with: 3941 / 804

Let's proceed to step 7:
804 can be fit into 3941 4 times, resulting in a remainder of 725.
Record the quotient 4 as the next digit in the result. 
Result so far: 3874.0
Deduct 3216 from 3941 and we're left with 725.
Grab the next digit (0) from the dividend, add it to 725, then carry on: 7250 / 804

Going ahead to step 8:
804 goes into 7250 9 times with a remainder of 14.
Record the quotient 9 as the next digit in the result. 
Result so far: 38749.0
Deduct 7236 from 7250 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 9:
When dividing 140 by 804, we get 0 with a remainder of 140.
Record the quotient 0 as the next digit in the result. 
Result so far: 38749.0
If we take 0 away from 140, we end up with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Going ahead to step 10:
If we divide 1400 by 804, we get 1 and a remainder of 596.
Record the quotient 1 as the next digit in the result. 
Result so far: 38749.01
If we take 804 away from 1400, we end up with 596.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5960, and continue the process.

Moving on to step 11:
If we divide 5960 by 804, we get 7 and a remainder of 332.
Record the quotient 7 as the next digit in the result. 
Result so far: 38749.017
Subtracting 5628 from 5960 leaves us with 332.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3320, and continue the process.

On to step 12:
804 can be fit into 3320 4 times, resulting in a remainder of 104.
Put 4 as the next digit of the answer. 
Result so far: 38749.0174
Deduct 3216 from 3320 and we're left with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

Let's proceed to step 13:
The number 804 fits into 1040 1 times, leaving a remainder of 236.
Record the quotient 1 as the next digit in the result. 
Result so far: 38749.01741
If we take 804 away from 1040, we end up with 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

Let's proceed to step 14:
804 goes into 2360 2 times with a remainder of 752.
The next digit of our result is 2. 
Result so far: 38749.017412
The remainder is 752 after subtracting 1608 from 2360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7520, and continue the process.

Moving on to step 15:
7520 divided by 804 is 9 with a remainder of 284.
Record the quotient 9 as the next digit in the result. 
Result so far: 38749.0174129
Deduct 7236 from 7520 and we're left with 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Advancing to step 16:
2840 divided by 804 is 3 with a remainder of 428.
Record the quotient 3 as the next digit in the result. 
Result so far: 38749.01741293
Deduct 2412 from 2840 and we're left with 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

The final result is 38749.01741293 with a remainder of 4.28e-07.