86645786 ÷ 215 
Let's see how many times 215 fits into 86645786.

On to step 1:
When dividing 8 by 215, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 215

Let's proceed to step 2:
86 divided by 215 is 0 with a remainder of 86.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 86, we end up with 86.
Grab the next digit (6) from the dividend, add it to 86, then carry on: 866 / 215

Step 3:
The number 215 fits into 866 4 times, leaving a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 4.0
If we take 860 away from 866, we end up with 6.
Grab the next digit (4) from the dividend, add it to 6, then carry on: 64 / 215

Advancing to step 4:
When dividing 64 by 215, we get 0 with a remainder of 64.
The next digit of our result is 0. 
Result so far: 40.0
The remainder is 64 after subtracting 0 from 64.
Fetch the next digit (5) from the dividend, attach it to 64 and continue: 645 / 215

Moving on to step 5:
If we divide 645 by 215, we get 3 and a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 403.0
Subtracting 645 from 645 leaves us with 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 215

Advancing to step 6:
215 can be fit into 7 0 times, resulting in a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 4030.0
The remainder is 7 after subtracting 0 from 7.
Bring next digit (8) of the dividend behind the 7 and repeat the process: 78 / 215

Step 7:
If we divide 78 by 215, we get 0 and a remainder of 78.
The next digit of our result is 0. 
Result so far: 40300.0
The remainder is 78 after subtracting 0 from 78.
Bring next digit (6) of the dividend behind the 78 and repeat the process: 786 / 215

Let's proceed to step 8:
The number 215 fits into 786 3 times, leaving a remainder of 141.
Put 3 as the next digit of the answer. 
Result so far: 403003.0
Subtracting 645 from 786 leaves us with 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

On to step 9:
215 can be fit into 1410 6 times, resulting in a remainder of 120.
The number 6 becomes the next digit in our result. 
Result so far: 403003.6
If we take 1290 away from 1410, we end up with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Advancing to step 10:
The number 215 fits into 1200 5 times, leaving a remainder of 125.
Write down 5 as next digit of the result. 
Result so far: 403003.65
The remainder is 125 after subtracting 1075 from 1200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

Step 11:
215 can be fit into 1250 5 times, resulting in a remainder of 175.
Write down 5 as next digit of the result. 
Result so far: 403003.655
Deduct 1075 from 1250 and we're left with 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

The quotient of the division is 403003.655, and the remainder is 0.0175.