31401209 divided by 387 
We want to figure out the number of times 31401209 can be divided by 387.

On to step 1:
When dividing 3 by 387, we get 0 with a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 387

Step 2:
387 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
Deduct 0 from 31 and we're left with 31.
Append the next digit (4) from the dividend to 31 and continue with: 314 / 387

Advancing to step 3:
387 goes into 314 0 times with a remainder of 314.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 314 after subtracting 0 from 314.
Fetch the next digit (0) from the dividend, attach it to 314 and continue: 3140 / 387

On to step 4:
The number 387 fits into 3140 8 times, leaving a remainder of 44.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtract 3096 from 3140 to get 44.
Grab the next digit (1) from the dividend, add it to 44, then carry on: 441 / 387

Let's proceed to step 5:
441 divided by 387 is 1 with a remainder of 54.
Put 1 as the next digit of the answer. 
Result so far: 81.0
If we take 387 away from 441, we end up with 54.
Append the next digit (2) from the dividend to 54 and continue with: 542 / 387

Moving on to step 6:
When dividing 542 by 387, we get 1 with a remainder of 155.
Use 1 as the next digit of our solution. 
Result so far: 811.0
Deduct 387 from 542 and we're left with 155.
Take the next digit (0) from the dividend and append it to 155, then repeat: 1550 / 387

Moving on to step 7:
387 can be fit into 1550 4 times, resulting in a remainder of 2.
The next digit of our result is 4. 
Result so far: 8114.0
Subtracting 1548 from 1550 leaves us with 2.
Include the next digit (9) from the dividend after 2, then repeat: 29 / 387

Advancing to step 8:
387 can be fit into 29 0 times, resulting in a remainder of 29.
The next digit of our result is 0. 
Result so far: 81140.0
The remainder is 29 after subtracting 0 from 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 9:
When dividing 290 by 387, we get 0 with a remainder of 290.
Record the quotient 0 as the next digit in the result. 
Result so far: 81140.0
If we subtract 0 from 290, we get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

Moving on to step 10:
387 goes into 2900 7 times with a remainder of 191.
The next digit of our result is 7. 
Result so far: 81140.07
Deduct 2709 from 2900 and we're left 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.

Let's proceed to step 11:
The number 387 fits into 1910 4 times, leaving a remainder of 362.
The number 4 becomes the next digit in our result. 
Result so far: 81140.074
The remainder is 362 after subtracting 1548 from 1910.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

Moving on to step 12:
3620 divided by 387 is 9 with a remainder of 137.
The number 9 becomes the next digit in our result. 
Result so far: 81140.0749
Subtracting 3483 from 3620 leaves us with 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Moving on to step 13:
The number 387 fits into 1370 3 times, leaving a remainder of 209.
Record the quotient 3 as the next digit in the result. 
Result so far: 81140.07493
Subtract 1161 from 1370 to get 209.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Advancing to step 14:
2090 divided by 387 is 5 with a remainder of 155.
Record the quotient 5 as the next digit in the result. 
Result so far: 81140.074935
Subtract 1935 from 2090 to get 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

On to step 15:
If we divide 1550 by 387, we get 4 and a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 81140.0749354
If we subtract 1548 from 1550, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 16:
If we divide 20 by 387, we get 0 and a remainder of 20.
The next digit of our result is 0. 
Result so far: 81140.0749354
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

In conclusion, the division gives 81140.0749354 with a balance of 2e-08.