Let's divide 1439421 by 153
We want to figure out the number of times 1439421 can be divided by 153.

Step 1:
153 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Take the next digit (4) from the dividend and append it to 1, then repeat: 14 / 153

Step 2:
The number 153 fits into 14 0 times, leaving a remainder of 14.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 14 after subtracting 0 from 14.
Take the next digit (3) from the dividend and append it to 14, then repeat: 143 / 153

On to step 3:
153 goes into 143 0 times with a remainder of 143.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 143 to get 143.
Include the next digit (9) from the dividend after 143, then repeat: 1439 / 153

Step 4:
When dividing 1439 by 153, we get 9 with a remainder of 62.
Use 9 as the next digit of our solution. 
Result so far: 9.0
Subtracting 1377 from 1439 leaves us with 62.
Include the next digit (4) from the dividend after 62, then repeat: 624 / 153

On to step 5:
When dividing 624 by 153, we get 4 with a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 94.0
Deduct 612 from 624 and we're left with 12.
Append the next digit (2) from the dividend to 12 and continue with: 122 / 153

Going ahead to step 6:
When dividing 122 by 153, we get 0 with a remainder of 122.
Put 0 as the next digit of the answer. 
Result so far: 940.0
Deduct 0 from 122 and we're left with 122.
Include the next digit (1) from the dividend after 122, then repeat: 1221 / 153

Advancing to step 7:
1221 divided by 153 is 7 with a remainder of 150.
The next digit of our result is 7. 
Result so far: 9407.0
Deduct 1071 from 1221 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

On to step 8:
When dividing 1500 by 153, we get 9 with a remainder of 123.
Put 9 as the next digit of the answer. 
Result so far: 9407.9
If we subtract 1377 from 1500, we get 123.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1230, and continue the process.

On to step 9:
1230 divided by 153 is 8 with a remainder of 6.
The number 8 becomes the next digit in our result. 
Result so far: 9407.98
Deduct 1224 from 1230 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Moving on to step 10:
If we divide 60 by 153, we get 0 and a remainder of 60.
The number 0 becomes the next digit in our result. 
Result so far: 9407.98
Deduct 0 from 60 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 11:
If we divide 600 by 153, we get 3 and a remainder of 141.
The number 3 becomes the next digit in our result. 
Result so far: 9407.9803
If we subtract 459 from 600, we get 141.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1410, and continue the process.

Let's proceed to step 12:
153 can be fit into 1410 9 times, resulting in a remainder of 33.
Use 9 as the next digit of our solution. 
Result so far: 9407.98039
Deduct 1377 from 1410 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Moving on to step 13:
153 can be fit into 330 2 times, resulting in a remainder of 24.
Use 2 as the next digit of our solution. 
Result so far: 9407.980392
If we take 306 away from 330, we end up with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Let's proceed to step 14:
153 can be fit into 240 1 times, resulting in a remainder of 87.
Put 1 as the next digit of the answer. 
Result so far: 9407.9803921
If we take 153 away from 240, we end up with 87.
Since there are no more digits in the dividend, we add a zero to the remainder making it 870, and continue the process.

Step 15:
153 goes into 870 5 times with a remainder of 105.
Use 5 as the next digit of our solution. 
Result so far: 9407.98039215
If we subtract 765 from 870, we get 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

The final outcome is 9407.98039215, with a leftover of 1.05e-07.