We look at the division of 61821553 by 144 
We want to figure out the number of times 61821553 can be divided by 144.

Going ahead to step 1:
When dividing 6 by 144, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 144

Going ahead to step 2:
144 can be fit into 61 0 times, resulting in a remainder of 61.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 61 leaves us with 61.
Include the next digit (8) from the dividend after 61, then repeat: 618 / 144

Going ahead to step 3:
144 goes into 618 4 times with a remainder of 42.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 42 after subtracting 576 from 618.
Bring next digit (2) of the dividend behind the 42 and repeat the process: 422 / 144

Advancing to step 4:
When dividing 422 by 144, we get 2 with a remainder of 134.
Write down 2 as next digit of the result. 
Result so far: 42.0
Subtracting 288 from 422 leaves us with 134.
Append the next digit (1) from the dividend to 134 and continue with: 1341 / 144

On to step 5:
The number 144 fits into 1341 9 times, leaving a remainder of 45.
Write down 9 as next digit of the result. 
Result so far: 429.0
The remainder is 45 after subtracting 1296 from 1341.
Grab the next digit (5) from the dividend, add it to 45, then carry on: 455 / 144

Step 6:
When dividing 455 by 144, we get 3 with a remainder of 23.
Write down 3 as next digit of the result. 
Result so far: 4293.0
Subtract 432 from 455 to get 23.
Fetch the next digit (5) from the dividend, attach it to 23 and continue: 235 / 144

On to step 7:
The number 144 fits into 235 1 times, leaving a remainder of 91.
Record the quotient 1 as the next digit in the result. 
Result so far: 42931.0
Deduct 144 from 235 and we're left with 91.
Append the next digit (3) from the dividend to 91 and continue with: 913 / 144

Going ahead to step 8:
144 can be fit into 913 6 times, resulting in a remainder of 49.
The next digit of our result is 6. 
Result so far: 429316.0
The remainder is 49 after subtracting 864 from 913.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Advancing to step 9:
If we divide 490 by 144, we get 3 and a remainder of 58.
Record the quotient 3 as the next digit in the result. 
Result so far: 429316.3
Subtracting 432 from 490 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 10:
580 divided by 144 is 4 with a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 429316.34
Subtract 576 from 580 to 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.

Moving on to step 11:
If we divide 40 by 144, we get 0 and a remainder of 40.
Record the quotient 0 as the next digit in the result. 
Result so far: 429316.34
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 12:
400 divided by 144 is 2 with a remainder of 112.
Write down 2 as next digit of the result. 
Result so far: 429316.3402
The remainder is 112 after subtracting 288 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Advancing to step 13:
The number 144 fits into 1120 7 times, leaving a remainder of 112.
The next digit of our result is 7. 
Result so far: 429316.34027
The remainder is 112 after subtracting 1008 from 1120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Going ahead to step 14:
144 can be fit into 1120 7 times, resulting in a remainder of 112.
The next digit of our result is 7. 
Result so far: 429316.340277
Deduct 1008 from 1120 and we're left with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

The final result is 429316.340277 with a remainder of 1.12e-05.