We're dividing 16428234 by 406 
We want to figure out the number of times 16428234 can be divided by 406.

Step 1:
When dividing 1 by 406, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 406

Moving on to step 2:
406 can be fit into 16 0 times, resulting in a remainder of 16.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 16, we get 16.
Fetch the next digit (4) from the dividend, attach it to 16 and continue: 164 / 406

On to step 3:
406 can be fit into 164 0 times, resulting in a remainder of 164.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 164, we get 164.
Include the next digit (2) from the dividend after 164, then repeat: 1642 / 406

Step 4:
1642 divided by 406 is 4 with a remainder of 18.
The next digit of our result is 4. 
Result so far: 4.0
If we take 1624 away from 1642, we end up with 18.
Grab the next digit (8) from the dividend, add it to 18, then carry on: 188 / 406

Going ahead to step 5:
When dividing 188 by 406, we get 0 with a remainder of 188.
Put 0 as the next digit of the answer. 
Result so far: 40.0
Deduct 0 from 188 and we're left with 188.
Include the next digit (2) from the dividend after 188, then repeat: 1882 / 406

Moving on to step 6:
The number 406 fits into 1882 4 times, leaving a remainder of 258.
Use 4 as the next digit of our solution. 
Result so far: 404.0
If we subtract 1624 from 1882, we get 258.
Grab the next digit (3) from the dividend, add it to 258, then carry on: 2583 / 406

Let's proceed to step 7:
406 can be fit into 2583 6 times, resulting in a remainder of 147.
Write down 6 as next digit of the result. 
Result so far: 4046.0
The remainder is 147 after subtracting 2436 from 2583.
Grab the next digit (4) from the dividend, add it to 147, then carry on: 1474 / 406

Advancing to step 8:
1474 divided by 406 is 3 with a remainder of 256.
Put 3 as the next digit of the answer. 
Result so far: 40463.0
The remainder is 256 after subtracting 1218 from 1474.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2560, and continue the process.

Advancing to step 9:
406 can be fit into 2560 6 times, resulting in a remainder of 124.
Put 6 as the next digit of the answer. 
Result so far: 40463.6
If we take 2436 away from 2560, we end up with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Let's proceed to step 10:
When dividing 1240 by 406, we get 3 with a remainder of 22.
Record the quotient 3 as the next digit in the result. 
Result so far: 40463.63
Subtract 1218 from 1240 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Moving on to step 11:
220 divided by 406 is 0 with a remainder of 220.
The number 0 becomes the next digit in our result. 
Result so far: 40463.63
Deduct 0 from 220 and we're left with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Moving on to step 12:
406 can be fit into 2200 5 times, resulting in a remainder of 170.
The number 5 becomes the next digit in our result. 
Result so far: 40463.6305
Subtracting 2030 from 2200 leaves us with 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Going ahead to step 13:
The number 406 fits into 1700 4 times, leaving a remainder of 76.
Write down 4 as next digit of the result. 
Result so far: 40463.63054
Subtracting 1624 from 1700 leaves us with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Going ahead to step 14:
When dividing 760 by 406, we get 1 with a remainder of 354.
Put 1 as the next digit of the answer. 
Result so far: 40463.630541
Deduct 406 from 760 and we're left with 354.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3540, and continue the process.

Let's proceed to step 15:
The number 406 fits into 3540 8 times, leaving a remainder of 292.
The next digit of our result is 8. 
Result so far: 40463.6305418
Deduct 3248 from 3540 and we're left with 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Moving on to step 16:
When dividing 2920 by 406, we get 7 with a remainder of 78.
The next digit of our result is 7. 
Result so far: 40463.63054187
Deduct 2842 from 2920 and we're left with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

The final result is 40463.63054187 with a remainder of 7.8e-08.