21980192 ÷ 306 
Our goal is to divide 21980192 by 306.

Let's proceed to step 1:
306 can be fit into 2 0 times, resulting in a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 306

Let's proceed to step 2:
The number 306 fits into 21 0 times, leaving a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Append the next digit (9) from the dividend to 21 and continue with: 219 / 306

Moving on to step 3:
If we divide 219 by 306, we get 0 and a remainder of 219.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 219, we get 219.
Bring next digit (8) of the dividend behind the 219 and repeat the process: 2198 / 306

On to step 4:
The number 306 fits into 2198 7 times, leaving a remainder of 56.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
Subtract 2142 from 2198 to get 56.
Take the next digit (0) from the dividend and append it to 56, then repeat: 560 / 306

On to step 5:
The number 306 fits into 560 1 times, leaving a remainder of 254.
The next digit of our result is 1. 
Result so far: 71.0
If we subtract 306 from 560, we get 254.
Include the next digit (1) from the dividend after 254, then repeat: 2541 / 306

Moving on to step 6:
306 goes into 2541 8 times with a remainder of 93.
The next digit of our result is 8. 
Result so far: 718.0
Subtracting 2448 from 2541 leaves us with 93.
Include the next digit (9) from the dividend after 93, then repeat: 939 / 306

Advancing to step 7:
When dividing 939 by 306, we get 3 with a remainder of 21.
Use 3 as the next digit of our solution. 
Result so far: 7183.0
If we take 918 away from 939, we end up with 21.
Grab the next digit (2) from the dividend, add it to 21, then carry on: 212 / 306

On to step 8:
If we divide 212 by 306, we get 0 and a remainder of 212.
Record the quotient 0 as the next digit in the result. 
Result so far: 71830.0
Subtracting 0 from 212 leaves us with 212.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

Moving on to step 9:
If we divide 2120 by 306, we get 6 and a remainder of 284.
The number 6 becomes the next digit in our result. 
Result so far: 71830.6
If we subtract 1836 from 2120, we get 284.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2840, and continue the process.

Let's proceed to step 10:
If we divide 2840 by 306, we get 9 and a remainder of 86.
Record the quotient 9 as the next digit in the result. 
Result so far: 71830.69
If we take 2754 away from 2840, we end up with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Advancing to step 11:
When dividing 860 by 306, we get 2 with a remainder of 248.
Record the quotient 2 as the next digit in the result. 
Result so far: 71830.692
If we subtract 612 from 860, we get 248.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2480, and continue the process.

Going ahead to step 12:
2480 divided by 306 is 8 with a remainder of 32.
The number 8 becomes the next digit in our result. 
Result so far: 71830.6928
Subtracting 2448 from 2480 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Step 13:
306 goes into 320 1 times with a remainder of 14.
Write down 1 as next digit of the result. 
Result so far: 71830.69281
Subtract 306 from 320 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 14:
If we divide 140 by 306, we get 0 and a remainder of 140.
Record the quotient 0 as the next digit in the result. 
Result so far: 71830.69281
Deduct 0 from 140 and we're left with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Going ahead to step 15:
1400 divided by 306 is 4 with a remainder of 176.
Put 4 as the next digit of the answer. 
Result so far: 71830.6928104
If we take 1224 away from 1400, we end up with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Step 16:
When dividing 1760 by 306, we get 5 with a remainder of 230.
Use 5 as the next digit of our solution. 
Result so far: 71830.69281045
Deduct 1530 from 1760 and we're left with 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

The final outcome is 71830.69281045, with a leftover of 2.3e-07.