Let's divide 248758 by 21
We're looking to find how many times 21 goes into 248758.

Moving on to step 1:
If we divide 2 by 21, we get 0 and a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (4) from the dividend after 2, then repeat: 24 / 21

Step 2:
When dividing 24 by 21, we get 1 with a remainder of 3.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 21 from 24 and we're left with 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 21

Step 3:
38 divided by 21 is 1 with a remainder of 17.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we subtract 21 from 38, we get 17.
Bring next digit (7) of the dividend behind the 17 and repeat the process: 177 / 21

On to step 4:
21 can be fit into 177 8 times, resulting in a remainder of 9.
The number 8 becomes the next digit in our result. 
Result so far: 118.0
Subtract 168 from 177 to get 9.
Grab the next digit (5) from the dividend, add it to 9, then carry on: 95 / 21

Moving on to step 5:
21 can be fit into 95 4 times, resulting in a remainder of 11.
The number 4 becomes the next digit in our result. 
Result so far: 1184.0
Subtracting 84 from 95 leaves us with 11.
Include the next digit (8) from the dividend after 11, then repeat: 118 / 21

Going ahead to step 6:
The number 21 fits into 118 5 times, leaving a remainder of 13.
Record the quotient 5 as the next digit in the result. 
Result so far: 11845.0
Subtract 105 from 118 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 7:
When dividing 130 by 21, we get 6 with a remainder of 4.
The next digit of our result is 6. 
Result so far: 11845.6
Subtracting 126 from 130 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 11845.61
Subtracting 21 from 40 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 9:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 11845.619
If we subtract 189 from 190, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 10:
The number 21 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 11845.619
Subtract 0 from 10 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 11:
100 divided by 21 is 4 with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 11845.61904
Subtracting 84 from 100 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 12:
When dividing 160 by 21, we get 7 with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 11845.619047
If we subtract 147 from 160, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 13:
If we divide 130 by 21, we get 6 and a remainder of 4.
The next digit of our result is 6. 
Result so far: 11845.6190476
Deduct 126 from 130 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 14:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Record the quotient 1 as the next digit in the result. 
Result so far: 11845.61904761
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The quotient of the division is 11845.61904761, and the remainder is 1.9e-08.