20434107 ÷ 405 
We want to figure out the number of times 20434107 can be divided by 405.

Advancing to step 1:
The number 405 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 405

On to step 2:
When dividing 20 by 405, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 20, we get 20.
Bring next digit (4) of the dividend behind the 20 and repeat the process: 204 / 405

Going ahead to step 3:
405 can be fit into 204 0 times, resulting in a remainder of 204.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 204 and we're left with 204.
Take the next digit (3) from the dividend and append it to 204, then repeat: 2043 / 405

Step 4:
When dividing 2043 by 405, we get 5 with a remainder of 18.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtract 2025 from 2043 to get 18.
Bring next digit (4) of the dividend behind the 18 and repeat the process: 184 / 405

Advancing to step 5:
If we divide 184 by 405, we get 0 and a remainder of 184.
Put 0 as the next digit of the answer. 
Result so far: 50.0
Subtracting 0 from 184 leaves us with 184.
Take the next digit (1) from the dividend and append it to 184, then repeat: 1841 / 405

Going ahead to step 6:
If we divide 1841 by 405, we get 4 and a remainder of 221.
Write down 4 as next digit of the result. 
Result so far: 504.0
The remainder is 221 after subtracting 1620 from 1841.
Append the next digit (0) from the dividend to 221 and continue with: 2210 / 405

Advancing to step 7:
405 goes into 2210 5 times with a remainder of 185.
The number 5 becomes the next digit in our result. 
Result so far: 5045.0
Deduct 2025 from 2210 and we're left with 185.
Bring next digit (7) of the dividend behind the 185 and repeat the process: 1857 / 405

Step 8:
If we divide 1857 by 405, we get 4 and a remainder of 237.
Record the quotient 4 as the next digit in the result. 
Result so far: 50454.0
The remainder is 237 after subtracting 1620 from 1857.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

Going ahead to step 9:
If we divide 2370 by 405, we get 5 and a remainder of 345.
Write down 5 as next digit of the result. 
Result so far: 50454.5
Subtracting 2025 from 2370 leaves us with 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

Step 10:
If we divide 3450 by 405, we get 8 and a remainder of 210.
Use 8 as the next digit of our solution. 
Result so far: 50454.58
Subtracting 3240 from 3450 leaves us with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Let's proceed to step 11:
405 goes into 2100 5 times with a remainder of 75.
The number 5 becomes the next digit in our result. 
Result so far: 50454.585
Subtract 2025 from 2100 to get 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Let's proceed to step 12:
750 divided by 405 is 1 with a remainder of 345.
Record the quotient 1 as the next digit in the result. 
Result so far: 50454.5851
Subtracting 405 from 750 leaves us with 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

Let's proceed to step 13:
405 can be fit into 3450 8 times, resulting in a remainder of 210.
Put 8 as the next digit of the answer. 
Result so far: 50454.58518
Deduct 3240 from 3450 and we're left with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

Going ahead to step 14:
The number 405 fits into 2100 5 times, leaving a remainder of 75.
The next digit of our result is 5. 
Result so far: 50454.585185
Deduct 2025 from 2100 and we're left with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 15:
750 divided by 405 is 1 with a remainder of 345.
The next digit of our result is 1. 
Result so far: 50454.5851851
If we take 405 away from 750, we end up with 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

Step 16:
The number 405 fits into 3450 8 times, leaving a remainder of 210.
Write down 8 as next digit of the result. 
Result so far: 50454.58518518
If we take 3240 away from 3450, we end up with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

The final result is 50454.58518518 with a remainder of 2.1e-07.