48961542 divided by 21 
We're looking to find how many times 21 goes into 48961542.

On to step 1:
The number 21 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 21

Advancing to step 2:
21 goes into 48 2 times with a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 42 from 48 and we're left with 6.
Take the next digit (9) from the dividend and append it to 6, then repeat: 69 / 21

On to step 3:
21 can be fit into 69 3 times, resulting in a remainder of 6.
Put 3 as the next digit of the answer. 
Result so far: 23.0
Subtracting 63 from 69 leaves us with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 21

Step 4:
The number 21 fits into 66 3 times, leaving a remainder of 3.
Use 3 as the next digit of our solution. 
Result so far: 233.0
Deduct 63 from 66 and we're left with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 21

On to step 5:
The number 21 fits into 31 1 times, leaving a remainder of 10.
The number 1 becomes the next digit in our result. 
Result so far: 2331.0
The remainder is 10 after subtracting 21 from 31.
Take the next digit (5) from the dividend and append it to 10, then repeat: 105 / 21

Going ahead to step 6:
21 can be fit into 105 5 times, resulting in a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 23315.0
If we subtract 105 from 105, we get 0.
Include the next digit (4) from the dividend after 0, then repeat: 4 / 21

Let's proceed to step 7:
If we divide 4 by 21, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 233150.0
Subtract 0 from 4 to get 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 21

Let's proceed to step 8:
21 goes into 42 2 times with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 2331502.0
Subtracting 42 from 42 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
When dividing 0 by 21, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 2331502.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
21 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 2331502.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 2331502.0 with a remaining 0.0.