73914079 divided by 21 
We want to figure out the number of times 73914079 can be divided by 21.

Step 1:
When dividing 7 by 21, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (3) from the dividend, add it to 7, then carry on: 73 / 21

Advancing to step 2:
73 divided by 21 is 3 with a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we take 63 away from 73, we end up with 10.
Append the next digit (9) from the dividend to 10 and continue with: 109 / 21

Going ahead to step 3:
The number 21 fits into 109 5 times, leaving a remainder of 4.
The number 5 becomes the next digit in our result. 
Result so far: 35.0
Deduct 105 from 109 and we're left with 4.
Fetch the next digit (1) from the dividend, attach it to 4 and continue: 41 / 21

On to step 4:
If we divide 41 by 21, we get 1 and a remainder of 20.
The next digit of our result is 1. 
Result so far: 351.0
Deduct 21 from 41 and we're left with 20.
Bring next digit (4) of the dividend behind the 20 and repeat the process: 204 / 21

Going ahead to step 5:
21 goes into 204 9 times with a remainder of 15.
Put 9 as the next digit of the answer. 
Result so far: 3519.0
If we subtract 189 from 204, we get 15.
Take the next digit (0) from the dividend and append it to 15, then repeat: 150 / 21

Advancing to step 6:
21 can be fit into 150 7 times, resulting in a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 35197.0
Subtracting 147 from 150 leaves us with 3.
Include the next digit (7) from the dividend after 3, then repeat: 37 / 21

Going ahead to step 7:
21 goes into 37 1 times with a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 351971.0
Deduct 21 from 37 and we're left with 16.
Grab the next digit (9) from the dividend, add it to 16, then carry on: 169 / 21

Advancing to step 8:
169 divided by 21 is 8 with a remainder of 1.
Record the quotient 8 as the next digit in the result. 
Result so far: 3519718.0
Deduct 168 from 169 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 9:
If we divide 10 by 21, we get 0 and a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 3519718.0
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
21 can be fit into 100 4 times, resulting in a remainder of 16.
The next digit of our result is 4. 
Result so far: 3519718.04
Subtract 84 from 100 to 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.

Let's proceed to step 11:
21 goes into 160 7 times with a remainder of 13.
Put 7 as the next digit of the answer. 
Result so far: 3519718.047
If we take 147 away from 160, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Advancing to step 12:
If we divide 130 by 21, we get 6 and a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 3519718.0476
If we subtract 126 from 130, we 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.

On to step 13:
If we divide 40 by 21, we get 1 and a remainder of 19.
The next digit of our result is 1. 
Result so far: 3519718.04761
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.

Advancing to step 14:
21 goes into 190 9 times with a remainder of 1.
The next digit of our result is 9. 
Result so far: 3519718.047619
Subtracting 189 from 190 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Let's proceed to step 15:
If we divide 10 by 21, we get 0 and a remainder of 10.
The next digit of our result is 0. 
Result so far: 3519718.047619
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 16:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 3519718.04761904
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 3519718.04761904, with a leftover of 1.6e-08.