84086196 ÷ 644 
We want to figure out the number of times 84086196 can be divided by 644.

Moving on to step 1:
If we divide 8 by 644, we get 0 and a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Append the next digit (4) from the dividend to 8 and continue with: 84 / 644

Let's proceed to step 2:
If we divide 84 by 644, we get 0 and a remainder of 84.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 84 after subtracting 0 from 84.
Include the next digit (0) from the dividend after 84, then repeat: 840 / 644

On to step 3:
840 divided by 644 is 1 with a remainder of 196.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 196 after subtracting 644 from 840.
Bring next digit (8) of the dividend behind the 196 and repeat the process: 1968 / 644

Going ahead to step 4:
The number 644 fits into 1968 3 times, leaving a remainder of 36.
Put 3 as the next digit of the answer. 
Result so far: 13.0
If we subtract 1932 from 1968, we get 36.
Include the next digit (6) from the dividend after 36, then repeat: 366 / 644

Going ahead to step 5:
644 can be fit into 366 0 times, resulting in a remainder of 366.
Write down 0 as next digit of the result. 
Result so far: 130.0
The remainder is 366 after subtracting 0 from 366.
Append the next digit (1) from the dividend to 366 and continue with: 3661 / 644

Moving on to step 6:
644 can be fit into 3661 5 times, resulting in a remainder of 441.
Write down 5 as next digit of the result. 
Result so far: 1305.0
If we subtract 3220 from 3661, we get 441.
Include the next digit (9) from the dividend after 441, then repeat: 4419 / 644

Advancing to step 7:
644 can be fit into 4419 6 times, resulting in a remainder of 555.
Write down 6 as next digit of the result. 
Result so far: 13056.0
If we subtract 3864 from 4419, we get 555.
Grab the next digit (6) from the dividend, add it to 555, then carry on: 5556 / 644

Going ahead to step 8:
The number 644 fits into 5556 8 times, leaving a remainder of 404.
The next digit of our result is 8. 
Result so far: 130568.0
If we take 5152 away from 5556, we end up with 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

Moving on to step 9:
644 goes into 4040 6 times with a remainder of 176.
Put 6 as the next digit of the answer. 
Result so far: 130568.6
Deduct 3864 from 4040 and we're left with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Going ahead to step 10:
644 goes into 1760 2 times with a remainder of 472.
The number 2 becomes the next digit in our result. 
Result so far: 130568.62
Subtract 1288 from 1760 to get 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Moving on to step 11:
If we divide 4720 by 644, we get 7 and a remainder of 212.
The next digit of our result is 7. 
Result so far: 130568.627
Deduct 4508 from 4720 and we're left with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Advancing to step 12:
When dividing 2120 by 644, we get 3 with a remainder of 188.
Put 3 as the next digit of the answer. 
Result so far: 130568.6273
The remainder is 188 after subtracting 1932 from 2120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

Advancing to step 13:
644 goes into 1880 2 times with a remainder of 592.
Put 2 as the next digit of the answer. 
Result so far: 130568.62732
The remainder is 592 after subtracting 1288 from 1880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

Moving on to step 14:
If we divide 5920 by 644, we get 9 and a remainder of 124.
Write down 9 as next digit of the result. 
Result so far: 130568.627329
Subtracting 5796 from 5920 leaves us with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

On to step 15:
The number 644 fits into 1240 1 times, leaving a remainder of 596.
Use 1 as the next digit of our solution. 
Result so far: 130568.6273291
Subtracting 644 from 1240 leaves us 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.

Step 16:
If we divide 5960 by 644, we get 9 and a remainder of 164.
Write down 9 as next digit of the result. 
Result so far: 130568.62732919
Deduct 5796 from 5960 and we're left with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Our division results in 130568.62732919 with a remaining 1.64e-07.