16428401 ÷ 642 
Let's see how many times 642 fits into 16428401.

Let's proceed to step 1:
642 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
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 / 642

On to step 2:
642 goes into 16 0 times with a remainder of 16.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Fetch the next digit (4) from the dividend, attach it to 16 and continue: 164 / 642

Let's proceed to step 3:
642 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
The remainder is 164 after subtracting 0 from 164.
Fetch the next digit (2) from the dividend, attach it to 164 and continue: 1642 / 642

Moving on to step 4:
If we divide 1642 by 642, we get 2 and a remainder of 358.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 358 after subtracting 1284 from 1642.
Append the next digit (8) from the dividend to 358 and continue with: 3588 / 642

Let's proceed to step 5:
642 can be fit into 3588 5 times, resulting in a remainder of 378.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
Deduct 3210 from 3588 and we're left with 378.
Include the next digit (4) from the dividend after 378, then repeat: 3784 / 642

Step 6:
3784 divided by 642 is 5 with a remainder of 574.
The number 5 becomes the next digit in our result. 
Result so far: 255.0
Subtracting 3210 from 3784 leaves us with 574.
Bring next digit (0) of the dividend behind the 574 and repeat the process: 5740 / 642

Advancing to step 7:
642 goes into 5740 8 times with a remainder of 604.
Use 8 as the next digit of our solution. 
Result so far: 2558.0
Deduct 5136 from 5740 and we're left with 604.
Bring next digit (1) of the dividend behind the 604 and repeat the process: 6041 / 642

Going ahead to step 8:
If we divide 6041 by 642, we get 9 and a remainder of 263.
Write down 9 as next digit of the result. 
Result so far: 25589.0
Subtract 5778 from 6041 to get 263.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2630, and continue the process.

Moving on to step 9:
642 can be fit into 2630 4 times, resulting in a remainder of 62.
Use 4 as the next digit of our solution. 
Result so far: 25589.4
The remainder is 62 after subtracting 2568 from 2630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Let's proceed to step 10:
The number 642 fits into 620 0 times, leaving a remainder of 620.
The number 0 becomes the next digit in our result. 
Result so far: 25589.4
If we subtract 0 from 620, we get 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Going ahead to step 11:
642 can be fit into 6200 9 times, resulting in a remainder of 422.
Use 9 as the next digit of our solution. 
Result so far: 25589.409
If we take 5778 away from 6200, we end up with 422.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4220, and continue the process.

Step 12:
642 goes into 4220 6 times with a remainder of 368.
Record the quotient 6 as the next digit in the result. 
Result so far: 25589.4096
Subtract 3852 from 4220 to get 368.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3680, and continue the process.

Let's proceed to step 13:
If we divide 3680 by 642, we get 5 and a remainder of 470.
Put 5 as the next digit of the answer. 
Result so far: 25589.40965
Deduct 3210 from 3680 and we're left with 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4700, and continue the process.

Let's proceed to step 14:
When dividing 4700 by 642, we get 7 with a remainder of 206.
Use 7 as the next digit of our solution. 
Result so far: 25589.409657
Subtract 4494 from 4700 to get 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Moving on to step 15:
642 can be fit into 2060 3 times, resulting in a remainder of 134.
Record the quotient 3 as the next digit in the result. 
Result so far: 25589.4096573
The remainder is 134 after subtracting 1926 from 2060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1340, and continue the process.

Let's proceed to step 16:
1340 divided by 642 is 2 with a remainder of 56.
Record the quotient 2 as the next digit in the result. 
Result so far: 25589.40965732
Subtracting 1284 from 1340 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The final result is 25589.40965732 with a remainder of 5.6e-08.