Let's divide 91863529 by 215
We're looking to find how many times 215 goes into 91863529.

Step 1:
If we divide 9 by 215, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Grab the next digit (1) from the dividend, add it to 9, then carry on: 91 / 215

On to step 2:
When dividing 91 by 215, we get 0 with a remainder of 91.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 91 after subtracting 0 from 91.
Include the next digit (8) from the dividend after 91, then repeat: 918 / 215

Going ahead to step 3:
If we divide 918 by 215, we get 4 and a remainder of 58.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 860 from 918 and we're left with 58.
Bring next digit (6) of the dividend behind the 58 and repeat the process: 586 / 215

Going ahead to step 4:
586 divided by 215 is 2 with a remainder of 156.
The next digit of our result is 2. 
Result so far: 42.0
Subtract 430 from 586 to get 156.
Append the next digit (3) from the dividend to 156 and continue with: 1563 / 215

On to step 5:
When dividing 1563 by 215, we get 7 with a remainder of 58.
Use 7 as the next digit of our solution. 
Result so far: 427.0
The remainder is 58 after subtracting 1505 from 1563.
Fetch the next digit (5) from the dividend, attach it to 58 and continue: 585 / 215

Step 6:
If we divide 585 by 215, we get 2 and a remainder of 155.
Record the quotient 2 as the next digit in the result. 
Result so far: 4272.0
The remainder is 155 after subtracting 430 from 585.
Fetch the next digit (2) from the dividend, attach it to 155 and continue: 1552 / 215

Going ahead to step 7:
215 can be fit into 1552 7 times, resulting in a remainder of 47.
Record the quotient 7 as the next digit in the result. 
Result so far: 42727.0
If we subtract 1505 from 1552, we get 47.
Include the next digit (9) from the dividend after 47, then repeat: 479 / 215

Advancing to step 8:
215 goes into 479 2 times with a remainder of 49.
The next digit of our result is 2. 
Result so far: 427272.0
Subtract 430 from 479 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Step 9:
The number 215 fits into 490 2 times, leaving a remainder of 60.
Record the quotient 2 as the next digit in the result. 
Result so far: 427272.2
If we take 430 away from 490, we end up 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.

Advancing to step 10:
The number 215 fits into 600 2 times, leaving a remainder of 170.
Record the quotient 2 as the next digit in the result. 
Result so far: 427272.22
If we subtract 430 from 600, we get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

The final result is 427272.22 with a remainder of 0.17.