We look at the division of 319693 by 21 
We want to figure out the number of times 319693 can be divided by 21.

Going ahead to step 1:
The number 21 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 21

Advancing to step 2:
When dividing 31 by 21, we get 1 with a remainder of 10.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 21 from 31, we get 10.
Append the next digit (9) from the dividend to 10 and continue with: 109 / 21

Advancing to step 3:
If we divide 109 by 21, we get 5 and a remainder of 4.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Subtract 105 from 109 to get 4.
Grab the next digit (6) from the dividend, add it to 4, then carry on: 46 / 21

Going ahead to step 4:
When dividing 46 by 21, we get 2 with a remainder of 4.
The next digit of our result is 2. 
Result so far: 152.0
If we subtract 42 from 46, we get 4.
Fetch the next digit (9) from the dividend, attach it to 4 and continue: 49 / 21

Moving on to step 5:
49 divided by 21 is 2 with a remainder of 7.
Use 2 as the next digit of our solution. 
Result so far: 1522.0
If we take 42 away from 49, we end up with 7.
Grab the next digit (3) from the dividend, add it to 7, then carry on: 73 / 21

Going ahead to step 6:
If we divide 73 by 21, we get 3 and a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 15223.0
Deduct 63 from 73 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.

Moving on to step 7:
21 goes into 100 4 times with a remainder of 16.
Use 4 as the next digit of our solution. 
Result so far: 15223.4
If we take 84 away from 100, we end up 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.

Step 8:
160 divided by 21 is 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 15223.47
Subtract 147 from 160 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.

Step 9:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 15223.476
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.

Going ahead to step 10:
40 divided by 21 is 1 with a remainder of 19.
The number 1 becomes the next digit in our result. 
Result so far: 15223.4761
If we take 21 away from 40, we end up 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.

Going ahead to step 11:
190 divided by 21 is 9 with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 15223.47619
Deduct 189 from 190 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.

Going ahead to step 12:
21 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 15223.47619
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.

Moving on to step 13:
When dividing 100 by 21, we get 4 with a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 15223.4761904
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.

Moving on to step 14:
If we divide 160 by 21, we get 7 and a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 15223.47619047
Deduct 147 from 160 and we're left 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.

After the division, we end up with 15223.47619047 and a remainder of 1.3e-08.