Let's divide 16349432 by 421
We want to divide 16349432 by 421.

Step 1:
When dividing 1 by 421, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Append the next digit (6) from the dividend to 1 and continue with: 16 / 421

On to step 2:
16 divided by 421 is 0 with a remainder of 16.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 16, we end up with 16.
Grab the next digit (3) from the dividend, add it to 16, then carry on: 163 / 421

Moving on to step 3:
If we divide 163 by 421, we get 0 and a remainder of 163.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 163 leaves us with 163.
Grab the next digit (4) from the dividend, add it to 163, then carry on: 1634 / 421

Advancing to step 4:
The number 421 fits into 1634 3 times, leaving a remainder of 371.
Use 3 as the next digit of our solution. 
Result so far: 3.0
If we subtract 1263 from 1634, we get 371.
Include the next digit (9) from the dividend after 371, then repeat: 3719 / 421

Going ahead to step 5:
The number 421 fits into 3719 8 times, leaving a remainder of 351.
Record the quotient 8 as the next digit in the result. 
Result so far: 38.0
Subtracting 3368 from 3719 leaves us with 351.
Grab the next digit (4) from the dividend, add it to 351, then carry on: 3514 / 421

Moving on to step 6:
3514 divided by 421 is 8 with a remainder of 146.
Use 8 as the next digit of our solution. 
Result so far: 388.0
The remainder is 146 after subtracting 3368 from 3514.
Fetch the next digit (3) from the dividend, attach it to 146 and continue: 1463 / 421

Advancing to step 7:
421 can be fit into 1463 3 times, resulting in a remainder of 200.
Put 3 as the next digit of the answer. 
Result so far: 3883.0
Subtracting 1263 from 1463 leaves us with 200.
Bring next digit (2) of the dividend behind the 200 and repeat the process: 2002 / 421

Going ahead to step 8:
When dividing 2002 by 421, we get 4 with a remainder of 318.
Put 4 as the next digit of the answer. 
Result so far: 38834.0
The remainder is 318 after subtracting 1684 from 2002.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Step 9:
421 goes into 3180 7 times with a remainder of 233.
Use 7 as the next digit of our solution. 
Result so far: 38834.7
If we take 2947 away from 3180, we end up with 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

On to step 10:
2330 divided by 421 is 5 with a remainder of 225.
The next digit of our result is 5. 
Result so far: 38834.75
If we take 2105 away from 2330, we end up with 225.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2250, and continue the process.

Moving on to step 11:
421 goes into 2250 5 times with a remainder of 145.
Record the quotient 5 as the next digit in the result. 
Result so far: 38834.755
If we take 2105 away from 2250, we end up with 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

The quotient of the division is 38834.755, and the remainder is 0.0145.