We look at the division of 43190405 by 285 
We want to figure out the number of times 43190405 can be divided by 285.

On to step 1:
285 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (3) from the dividend after 4, then repeat: 43 / 285

Let's proceed to step 2:
When dividing 43 by 285, we get 0 with a remainder of 43.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 43 and we're left with 43.
Include the next digit (1) from the dividend after 43, then repeat: 431 / 285

Moving on to step 3:
431 divided by 285 is 1 with a remainder of 146.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 285 from 431, we get 146.
Take the next digit (9) from the dividend and append it to 146, then repeat: 1469 / 285

Let's proceed to step 4:
When dividing 1469 by 285, we get 5 with a remainder of 44.
Write down 5 as next digit of the result. 
Result so far: 15.0
Subtract 1425 from 1469 to get 44.
Bring next digit (0) of the dividend behind the 44 and repeat the process: 440 / 285

Moving on to step 5:
If we divide 440 by 285, we get 1 and a remainder of 155.
The next digit of our result is 1. 
Result so far: 151.0
Subtract 285 from 440 to get 155.
Include the next digit (4) from the dividend after 155, then repeat: 1554 / 285

Let's proceed to step 6:
1554 divided by 285 is 5 with a remainder of 129.
Write down 5 as next digit of the result. 
Result so far: 1515.0
Deduct 1425 from 1554 and we're left with 129.
Take the next digit (0) from the dividend and append it to 129, then repeat: 1290 / 285

Let's proceed to step 7:
285 goes into 1290 4 times with a remainder of 150.
Record the quotient 4 as the next digit in the result. 
Result so far: 15154.0
Subtract 1140 from 1290 to get 150.
Bring next digit (5) of the dividend behind the 150 and repeat the process: 1505 / 285

Let's proceed to step 8:
When dividing 1505 by 285, we get 5 with a remainder of 80.
Use 5 as the next digit of our solution. 
Result so far: 151545.0
If we subtract 1425 from 1505, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 9:
When dividing 800 by 285, we get 2 with a remainder of 230.
The number 2 becomes the next digit in our result. 
Result so far: 151545.2
Subtract 570 from 800 to get 230.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2300, and continue the process.

Step 10:
The number 285 fits into 2300 8 times, leaving a remainder of 20.
Put 8 as the next digit of the answer. 
Result so far: 151545.28
Subtract 2280 from 2300 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 11:
285 can be fit into 200 0 times, resulting in a remainder of 200.
Write down 0 as next digit of the result. 
Result so far: 151545.28
Subtract 0 from 200 to get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Advancing to step 12:
When dividing 2000 by 285, we get 7 with a remainder of 5.
Put 7 as the next digit of the answer. 
Result so far: 151545.2807
Deduct 1995 from 2000 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 13:
285 can be fit into 50 0 times, resulting in a remainder of 50.
The next digit of our result is 0. 
Result so far: 151545.2807
Deduct 0 from 50 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Let's proceed to step 14:
The number 285 fits into 500 1 times, leaving a remainder of 215.
The number 1 becomes the next digit in our result. 
Result so far: 151545.280701
The remainder is 215 after subtracting 285 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

Moving on to step 15:
285 can be fit into 2150 7 times, resulting in a remainder of 155.
The number 7 becomes the next digit in our result. 
Result so far: 151545.2807017
Deduct 1995 from 2150 and we're left with 155.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1550, and continue the process.

Let's proceed to step 16:
The number 285 fits into 1550 5 times, leaving a remainder of 125.
Use 5 as the next digit of our solution. 
Result so far: 151545.28070175
The remainder is 125 after subtracting 1425 from 1550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1250, and continue the process.

The final outcome is 151545.28070175, with a leftover of 1.25e-07.