We're dividing 16169790 by 642 
We want to divide 16169790 by 642.

Advancing to step 1:
1 divided by 642 is 0 with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (6) from the dividend, attach it to 1 and continue: 16 / 642

Step 2:
642 can be fit into 16 0 times, resulting in a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 16, we end up with 16.
Fetch the next digit (1) from the dividend, attach it to 16 and continue: 161 / 642

Going ahead to step 3:
161 divided by 642 is 0 with a remainder of 161.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 161, we end up with 161.
Fetch the next digit (6) from the dividend, attach it to 161 and continue: 1616 / 642

Moving on to step 4:
1616 divided by 642 is 2 with a remainder of 332.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 1284 from 1616 leaves us with 332.
Grab the next digit (9) from the dividend, add it to 332, then carry on: 3329 / 642

Let's proceed to step 5:
When dividing 3329 by 642, we get 5 with a remainder of 119.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
Deduct 3210 from 3329 and we're left with 119.
Include the next digit (7) from the dividend after 119, then repeat: 1197 / 642

Moving on to step 6:
642 can be fit into 1197 1 times, resulting in a remainder of 555.
The next digit of our result is 1. 
Result so far: 251.0
The remainder is 555 after subtracting 642 from 1197.
Bring next digit (9) of the dividend behind the 555 and repeat the process: 5559 / 642

Going ahead to step 7:
If we divide 5559 by 642, we get 8 and a remainder of 423.
The next digit of our result is 8. 
Result so far: 2518.0
Subtracting 5136 from 5559 leaves us with 423.
Grab the next digit (0) from the dividend, add it to 423, then carry on: 4230 / 642

Let's proceed to step 8:
642 goes into 4230 6 times with a remainder of 378.
Write down 6 as next digit of the result. 
Result so far: 25186.0
Subtracting 3852 from 4230 leaves us with 378.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3780, and continue the process.

Advancing to step 9:
642 can be fit into 3780 5 times, resulting in a remainder of 570.
The number 5 becomes the next digit in our result. 
Result so far: 25186.5
Subtract 3210 from 3780 to get 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

On to step 10:
642 goes into 5700 8 times with a remainder of 564.
Use 8 as the next digit of our solution. 
Result so far: 25186.58
Deduct 5136 from 5700 and we're left with 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

Going ahead to step 11:
If we divide 5640 by 642, we get 8 and a remainder of 504.
The next digit of our result is 8. 
Result so far: 25186.588
If we subtract 5136 from 5640, we get 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

The final result is 25186.588 with a remainder of 0.0504.