53015315 divided by 144 
We want to figure out the number of times 53015315 can be divided by 144.

On to step 1:
If we divide 5 by 144, we get 0 and a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 5, we get 5.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 144

Advancing to step 2:
When dividing 53 by 144, we get 0 with a remainder of 53.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 53 after subtracting 0 from 53.
Fetch the next digit (0) from the dividend, attach it to 53 and continue: 530 / 144

Let's proceed to step 3:
When dividing 530 by 144, we get 3 with a remainder of 98.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we take 432 away from 530, we end up with 98.
Grab the next digit (1) from the dividend, add it to 98, then carry on: 981 / 144

Advancing to step 4:
981 divided by 144 is 6 with a remainder of 117.
Record the quotient 6 as the next digit in the result. 
Result so far: 36.0
Subtracting 864 from 981 leaves us with 117.
Fetch the next digit (5) from the dividend, attach it to 117 and continue: 1175 / 144

Step 5:
144 goes into 1175 8 times with a remainder of 23.
Put 8 as the next digit of the answer. 
Result so far: 368.0
If we take 1152 away from 1175, we end up with 23.
Take the next digit (3) from the dividend and append it to 23, then repeat: 233 / 144

Advancing to step 6:
When dividing 233 by 144, we get 1 with a remainder of 89.
Put 1 as the next digit of the answer. 
Result so far: 3681.0
Subtracting 144 from 233 leaves us with 89.
Bring next digit (1) of the dividend behind the 89 and repeat the process: 891 / 144

Going ahead to step 7:
The number 144 fits into 891 6 times, leaving a remainder of 27.
Put 6 as the next digit of the answer. 
Result so far: 36816.0
Subtract 864 from 891 to get 27.
Append the next digit (5) from the dividend to 27 and continue with: 275 / 144

Going ahead to step 8:
144 goes into 275 1 times with a remainder of 131.
Put 1 as the next digit of the answer. 
Result so far: 368161.0
Deduct 144 from 275 and we're left with 131.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1310, and continue the process.

Advancing to step 9:
If we divide 1310 by 144, we get 9 and a remainder of 14.
Write down 9 as next digit of the result. 
Result so far: 368161.9
If we take 1296 away from 1310, we end up with 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 10:
The number 144 fits into 140 0 times, leaving a remainder of 140.
Use 0 as the next digit of our solution. 
Result so far: 368161.9
If we subtract 0 from 140, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Step 11:
When dividing 1400 by 144, we get 9 with a remainder of 104.
Record the quotient 9 as the next digit in the result. 
Result so far: 368161.909
Deduct 1296 from 1400 and we're left with 104.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1040, and continue the process.

On to step 12:
The number 144 fits into 1040 7 times, leaving a remainder of 32.
Put 7 as the next digit of the answer. 
Result so far: 368161.9097
If we take 1008 away from 1040, we end up 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.

Let's proceed to step 13:
If we divide 320 by 144, we get 2 and a remainder of 32.
Write down 2 as next digit of the result. 
Result so far: 368161.90972
Subtracting 288 from 320 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.

Moving on to step 14:
320 divided by 144 is 2 with a remainder of 32.
The next digit of our result is 2. 
Result so far: 368161.909722
If we take 288 away from 320, we end up 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.

The final result is 368161.909722 with a remainder of 3.2e-06.