54221545 divided by 309 
Let's see how many times 309 fits into 54221545.

Advancing to step 1:
309 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 309

Advancing to step 2:
If we divide 54 by 309, we get 0 and a remainder of 54.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 54, we end up with 54.
Append the next digit (2) from the dividend to 54 and continue with: 542 / 309

Advancing to step 3:
The number 309 fits into 542 1 times, leaving a remainder of 233.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 309 away from 542, we end up with 233.
Grab the next digit (2) from the dividend, add it to 233, then carry on: 2332 / 309

Step 4:
309 can be fit into 2332 7 times, resulting in a remainder of 169.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
Deduct 2163 from 2332 and we're left with 169.
Grab the next digit (1) from the dividend, add it to 169, then carry on: 1691 / 309

On to step 5:
309 can be fit into 1691 5 times, resulting in a remainder of 146.
The number 5 becomes the next digit in our result. 
Result so far: 175.0
If we take 1545 away from 1691, we end up with 146.
Include the next digit (5) from the dividend after 146, then repeat: 1465 / 309

Let's proceed to step 6:
1465 divided by 309 is 4 with a remainder of 229.
Record the quotient 4 as the next digit in the result. 
Result so far: 1754.0
If we take 1236 away from 1465, we end up with 229.
Grab the next digit (4) from the dividend, add it to 229, then carry on: 2294 / 309

Let's proceed to step 7:
2294 divided by 309 is 7 with a remainder of 131.
The next digit of our result is 7. 
Result so far: 17547.0
If we take 2163 away from 2294, we end up with 131.
Append the next digit (5) from the dividend to 131 and continue with: 1315 / 309

Advancing to step 8:
If we divide 1315 by 309, we get 4 and a remainder of 79.
Write down 4 as next digit of the result. 
Result so far: 175474.0
The remainder is 79 after subtracting 1236 from 1315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 790, and continue the process.

Advancing to step 9:
If we divide 790 by 309, we get 2 and a remainder of 172.
The number 2 becomes the next digit in our result. 
Result so far: 175474.2
Deduct 618 from 790 and we're left with 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Step 10:
The number 309 fits into 1720 5 times, leaving a remainder of 175.
The number 5 becomes the next digit in our result. 
Result so far: 175474.25
If we subtract 1545 from 1720, we get 175.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1750, and continue the process.

Advancing to step 11:
309 goes into 1750 5 times with a remainder of 205.
The next digit of our result is 5. 
Result so far: 175474.255
If we subtract 1545 from 1750, we get 205.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

The final result is 175474.255 with a remainder of 0.0205.