We're dividing 54377439 by 45 
We want to divide 54377439 by 45.

Moving on to step 1:
If we divide 5 by 45, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 45

On to step 2:
45 can be fit into 54 1 times, resulting in a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtracting 45 from 54 leaves us with 9.
Include the next digit (3) from the dividend after 9, then repeat: 93 / 45

Moving on to step 3:
The number 45 fits into 93 2 times, leaving a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 12.0
Deduct 90 from 93 and we're left with 3.
Take the next digit (7) from the dividend and append it to 3, then repeat: 37 / 45

Advancing to step 4:
The number 45 fits into 37 0 times, leaving a remainder of 37.
Write down 0 as next digit of the result. 
Result so far: 120.0
If we take 0 away from 37, we end up with 37.
Fetch the next digit (7) from the dividend, attach it to 37 and continue: 377 / 45

Moving on to step 5:
When dividing 377 by 45, we get 8 with a remainder of 17.
Record the quotient 8 as the next digit in the result. 
Result so far: 1208.0
Subtracting 360 from 377 leaves us with 17.
Bring next digit (4) of the dividend behind the 17 and repeat the process: 174 / 45

Step 6:
When dividing 174 by 45, we get 3 with a remainder of 39.
Write down 3 as next digit of the result. 
Result so far: 12083.0
If we take 135 away from 174, we end up with 39.
Append the next digit (3) from the dividend to 39 and continue with: 393 / 45

On to step 7:
If we divide 393 by 45, we get 8 and a remainder of 33.
Put 8 as the next digit of the answer. 
Result so far: 120838.0
If we take 360 away from 393, we end up with 33.
Append the next digit (9) from the dividend to 33 and continue with: 339 / 45

Going ahead to step 8:
If we divide 339 by 45, we get 7 and a remainder of 24.
Write down 7 as next digit of the result. 
Result so far: 1208387.0
Subtract 315 from 339 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 9:
If we divide 240 by 45, we get 5 and a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 1208387.5
Subtracting 225 from 240 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 10:
If we divide 150 by 45, we get 3 and a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 1208387.53
If we subtract 135 from 150, we get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 11:
150 divided by 45 is 3 with a remainder of 15.
Use 3 as the next digit of our solution. 
Result so far: 1208387.533
Deduct 135 from 150 and we're left with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final outcome is 1208387.533, with a leftover of 0.0015.