Let's divide 86247689 by 645
We want to figure out the number of times 86247689 can be divided by 645.

Going ahead to step 1:
8 divided by 645 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 645

Step 2:
86 divided by 645 is 0 with a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 86 after subtracting 0 from 86.
Append the next digit (2) from the dividend to 86 and continue with: 862 / 645

Step 3:
645 can be fit into 862 1 times, resulting in a remainder of 217.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 645 away from 862, we end up with 217.
Append the next digit (4) from the dividend to 217 and continue with: 2174 / 645

Going ahead to step 4:
645 goes into 2174 3 times with a remainder of 239.
Put 3 as the next digit of the answer. 
Result so far: 13.0
If we subtract 1935 from 2174, we get 239.
Fetch the next digit (7) from the dividend, attach it to 239 and continue: 2397 / 645

Moving on to step 5:
When dividing 2397 by 645, we get 3 with a remainder of 462.
Use 3 as the next digit of our solution. 
Result so far: 133.0
If we subtract 1935 from 2397, we get 462.
Bring next digit (6) of the dividend behind the 462 and repeat the process: 4626 / 645

On to step 6:
4626 divided by 645 is 7 with a remainder of 111.
Use 7 as the next digit of our solution. 
Result so far: 1337.0
If we take 4515 away from 4626, we end up with 111.
Grab the next digit (8) from the dividend, add it to 111, then carry on: 1118 / 645

On to step 7:
The number 645 fits into 1118 1 times, leaving a remainder of 473.
Write down 1 as next digit of the result. 
Result so far: 13371.0
If we subtract 645 from 1118, we get 473.
Take the next digit (9) from the dividend and append it to 473, then repeat: 4739 / 645

Step 8:
If we divide 4739 by 645, we get 7 and a remainder of 224.
Put 7 as the next digit of the answer. 
Result so far: 133717.0
Subtract 4515 from 4739 to get 224.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Going ahead to step 9:
The number 645 fits into 2240 3 times, leaving a remainder of 305.
Put 3 as the next digit of the answer. 
Result so far: 133717.3
The remainder is 305 after subtracting 1935 from 2240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3050, and continue the process.

Step 10:
645 can be fit into 3050 4 times, resulting in a remainder of 470.
The number 4 becomes the next digit in our result. 
Result so far: 133717.34
The remainder is 470 after subtracting 2580 from 3050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Step 11:
The number 645 fits into 4700 7 times, leaving a remainder of 185.
The next digit of our result is 7. 
Result so far: 133717.347
Subtract 4515 from 4700 to get 185.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1850, and continue the process.

Advancing to step 12:
When dividing 1850 by 645, we get 2 with a remainder of 560.
Record the quotient 2 as the next digit in the result. 
Result so far: 133717.3472
The remainder is 560 after subtracting 1290 from 1850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5600, and continue the process.

Let's proceed to step 13:
When dividing 5600 by 645, we get 8 with a remainder of 440.
Write down 8 as next digit of the result. 
Result so far: 133717.34728
Subtract 5160 from 5600 to get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Step 14:
If we divide 4400 by 645, we get 6 and a remainder of 530.
The next digit of our result is 6. 
Result so far: 133717.347286
If we subtract 3870 from 4400, we get 530.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5300, and continue the process.

Let's proceed to step 15:
5300 divided by 645 is 8 with a remainder of 140.
Put 8 as the next digit of the answer. 
Result so far: 133717.3472868
If we subtract 5160 from 5300, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Step 16:
If we divide 1400 by 645, we get 2 and a remainder of 110.
Write down 2 as next digit of the result. 
Result so far: 133717.34728682
Subtract 1290 from 1400 to get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Our division results in 133717.34728682 with a remaining 1.1e-07.