We're dividing 742879 by 21 
Our goal is to divide 742879 by 21.

Step 1:
When dividing 7 by 21, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Fetch the next digit (4) from the dividend, attach it to 7 and continue: 74 / 21

On to step 2:
74 divided by 21 is 3 with a remainder of 11.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtract 63 from 74 to get 11.
Include the next digit (2) from the dividend after 11, then repeat: 112 / 21

Let's proceed to step 3:
When dividing 112 by 21, we get 5 with a remainder of 7.
Write down 5 as next digit of the result. 
Result so far: 35.0
Subtract 105 from 112 to get 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 21

Step 4:
78 divided by 21 is 3 with a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 353.0
Subtracting 63 from 78 leaves us with 15.
Take the next digit (7) from the dividend and append it to 15, then repeat: 157 / 21

Step 5:
The number 21 fits into 157 7 times, leaving a remainder of 10.
Use 7 as the next digit of our solution. 
Result so far: 3537.0
Subtract 147 from 157 to get 10.
Include the next digit (9) from the dividend after 10, then repeat: 109 / 21

Advancing to step 6:
21 goes into 109 5 times with a remainder of 4.
Record the quotient 5 as the next digit in the result. 
Result so far: 35375.0
Subtracting 105 from 109 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.

Let's proceed to step 7:
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: 35375.1
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.

On to step 8:
190 divided by 21 is 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 35375.19
Subtract 189 from 190 to 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.

Advancing to step 9:
10 divided by 21 is 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 35375.19
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 10:
21 can be fit into 100 4 times, resulting in a remainder of 16.
Put 4 as the next digit of the answer. 
Result so far: 35375.1904
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 11:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 35375.19047
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 12:
The number 21 fits into 130 6 times, leaving a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 35375.190476
Subtract 126 from 130 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 13:
When dividing 40 by 21, we get 1 with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 35375.1904761
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.

Step 14:
When dividing 190 by 21, we get 9 with a remainder of 1.
The next digit of our result is 9. 
Result so far: 35375.19047619
Subtract 189 from 190 to 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.

The quotient of the division is 35375.19047619, and the remainder is 1e-09.