Let's divide 78431886 by 631
Let's see how many times 631 fits into 78431886.

Step 1:
The number 631 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 631

On to step 2:
The number 631 fits into 78 0 times, leaving a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Append the next digit (4) from the dividend to 78 and continue with: 784 / 631

On to step 3:
631 can be fit into 784 1 times, resulting in a remainder of 153.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 631 from 784 and we're left with 153.
Include the next digit (3) from the dividend after 153, then repeat: 1533 / 631

Moving on to step 4:
If we divide 1533 by 631, we get 2 and a remainder of 271.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Subtract 1262 from 1533 to get 271.
Bring next digit (1) of the dividend behind the 271 and repeat the process: 2711 / 631

Moving on to step 5:
2711 divided by 631 is 4 with a remainder of 187.
Record the quotient 4 as the next digit in the result. 
Result so far: 124.0
If we subtract 2524 from 2711, we get 187.
Bring next digit (8) of the dividend behind the 187 and repeat the process: 1878 / 631

Let's proceed to step 6:
1878 divided by 631 is 2 with a remainder of 616.
The number 2 becomes the next digit in our result. 
Result so far: 1242.0
If we take 1262 away from 1878, we end up with 616.
Include the next digit (8) from the dividend after 616, then repeat: 6168 / 631

On to step 7:
6168 divided by 631 is 9 with a remainder of 489.
Record the quotient 9 as the next digit in the result. 
Result so far: 12429.0
Deduct 5679 from 6168 and we're left with 489.
Fetch the next digit (6) from the dividend, attach it to 489 and continue: 4896 / 631

Advancing to step 8:
631 can be fit into 4896 7 times, resulting in a remainder of 479.
Use 7 as the next digit of our solution. 
Result so far: 124297.0
The remainder is 479 after subtracting 4417 from 4896.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4790, and continue the process.

Let's proceed to step 9:
4790 divided by 631 is 7 with a remainder of 373.
Use 7 as the next digit of our solution. 
Result so far: 124297.7
If we subtract 4417 from 4790, we get 373.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3730, and continue the process.

Moving on to step 10:
The number 631 fits into 3730 5 times, leaving a remainder of 575.
Record the quotient 5 as the next digit in the result. 
Result so far: 124297.75
Deduct 3155 from 3730 and we're left with 575.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5750, and continue the process.

Going ahead to step 11:
The number 631 fits into 5750 9 times, leaving a remainder of 71.
Use 9 as the next digit of our solution. 
Result so far: 124297.759
If we take 5679 away from 5750, we end up with 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 12:
631 goes into 710 1 times with a remainder of 79.
Use 1 as the next digit of our solution. 
Result so far: 124297.7591
If we subtract 631 from 710, we get 79.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

On to step 13:
631 can be fit into 790 1 times, resulting in a remainder of 159.
Record the quotient 1 as the next digit in the result. 
Result so far: 124297.75911
Subtracting 631 from 790 leaves us with 159.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1590, and continue the process.

Our division results in 124297.75911 with a remaining 0.000159.