86736786 divided by 645 
We want to divide 86736786 by 645.

Step 1:
645 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 645

Advancing to step 2:
If we divide 86 by 645, we get 0 and a remainder of 86.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 86 and we're left with 86.
Fetch the next digit (7) from the dividend, attach it to 86 and continue: 867 / 645

Advancing to step 3:
645 goes into 867 1 times with a remainder of 222.
The next digit of our result is 1. 
Result so far: 1.0
If we take 645 away from 867, we end up with 222.
Fetch the next digit (3) from the dividend, attach it to 222 and continue: 2223 / 645

Let's proceed to step 4:
If we divide 2223 by 645, we get 3 and a remainder of 288.
The next digit of our result is 3. 
Result so far: 13.0
The remainder is 288 after subtracting 1935 from 2223.
Fetch the next digit (6) from the dividend, attach it to 288 and continue: 2886 / 645

Advancing to step 5:
645 goes into 2886 4 times with a remainder of 306.
Write down 4 as next digit of the result. 
Result so far: 134.0
If we subtract 2580 from 2886, we get 306.
Fetch the next digit (7) from the dividend, attach it to 306 and continue: 3067 / 645

Advancing to step 6:
The number 645 fits into 3067 4 times, leaving a remainder of 487.
The number 4 becomes the next digit in our result. 
Result so far: 1344.0
Subtracting 2580 from 3067 leaves us with 487.
Grab the next digit (8) from the dividend, add it to 487, then carry on: 4878 / 645

Going ahead to step 7:
645 can be fit into 4878 7 times, resulting in a remainder of 363.
Write down 7 as next digit of the result. 
Result so far: 13447.0
If we take 4515 away from 4878, we end up with 363.
Take the next digit (6) from the dividend and append it to 363, then repeat: 3636 / 645

Moving on to step 8:
The number 645 fits into 3636 5 times, leaving a remainder of 411.
Put 5 as the next digit of the answer. 
Result so far: 134475.0
Subtracting 3225 from 3636 leaves us with 411.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4110, and continue the process.

Going ahead to step 9:
When dividing 4110 by 645, we get 6 with a remainder of 240.
Record the quotient 6 as the next digit in the result. 
Result so far: 134475.6
The remainder is 240 after subtracting 3870 from 4110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Moving on to step 10:
2400 divided by 645 is 3 with a remainder of 465.
Write down 3 as next digit of the result. 
Result so far: 134475.63
If we subtract 1935 from 2400, we get 465.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4650, and continue the process.

Moving on to step 11:
645 can be fit into 4650 7 times, resulting in a remainder of 135.
Use 7 as the next digit of our solution. 
Result so far: 134475.637
Subtracting 4515 from 4650 leaves us with 135.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1350, and continue the process.

Let's proceed to step 12:
If we divide 1350 by 645, we get 2 and a remainder of 60.
The next digit of our result is 2. 
Result so far: 134475.6372
Subtracting 1290 from 1350 leaves us with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 13:
If we divide 600 by 645, we get 0 and a remainder of 600.
The number 0 becomes the next digit in our result. 
Result so far: 134475.6372
Deduct 0 from 600 and we're left with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

Going ahead to step 14:
645 can be fit into 6000 9 times, resulting in a remainder of 195.
The next digit of our result is 9. 
Result so far: 134475.637209
Subtract 5805 from 6000 to get 195.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1950, and continue the process.

Moving on to step 15:
When dividing 1950 by 645, we get 3 with a remainder of 15.
The next digit of our result is 3. 
Result so far: 134475.6372093
If we take 1935 away from 1950, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 16:
645 goes into 150 0 times with a remainder of 150.
Use 0 as the next digit of our solution. 
Result so far: 134475.6372093
Subtracting 0 from 150 leaves us with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

The final result is 134475.6372093 with a remainder of 1.5e-07.