Let's divide 16656347 by 421
Let's see how many times 421 fits into 16656347.

Step 1:
1 divided by 421 is 0 with a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 421

Step 2:
421 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 subtract 0 from 16, we get 16.
Bring next digit (6) of the dividend behind the 16 and repeat the process: 166 / 421

Let's proceed to step 3:
The number 421 fits into 166 0 times, leaving a remainder of 166.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 166 and we're left with 166.
Fetch the next digit (5) from the dividend, attach it to 166 and continue: 1665 / 421

Going ahead to step 4:
If we divide 1665 by 421, we get 3 and a remainder of 402.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 1263 from 1665 and we're left with 402.
Take the next digit (6) from the dividend and append it to 402, then repeat: 4026 / 421

On to step 5:
If we divide 4026 by 421, we get 9 and a remainder of 237.
Use 9 as the next digit of our solution. 
Result so far: 39.0
If we subtract 3789 from 4026, we get 237.
Append the next digit (3) from the dividend to 237 and continue with: 2373 / 421

Step 6:
If we divide 2373 by 421, we get 5 and a remainder of 268.
The next digit of our result is 5. 
Result so far: 395.0
Deduct 2105 from 2373 and we're left with 268.
Take the next digit (4) from the dividend and append it to 268, then repeat: 2684 / 421

Moving on to step 7:
421 can be fit into 2684 6 times, resulting in a remainder of 158.
Use 6 as the next digit of our solution. 
Result so far: 3956.0
Deduct 2526 from 2684 and we're left with 158.
Append the next digit (7) from the dividend to 158 and continue with: 1587 / 421

Advancing to step 8:
When dividing 1587 by 421, we get 3 with a remainder of 324.
The next digit of our result is 3. 
Result so far: 39563.0
Subtract 1263 from 1587 to get 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

On to step 9:
3240 divided by 421 is 7 with a remainder of 293.
The number 7 becomes the next digit in our result. 
Result so far: 39563.7
If we take 2947 away from 3240, we end up with 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2930, and continue the process.

Let's proceed to step 10:
421 goes into 2930 6 times with a remainder of 404.
Use 6 as the next digit of our solution. 
Result so far: 39563.76
The remainder is 404 after subtracting 2526 from 2930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

Step 11:
4040 divided by 421 is 9 with a remainder of 251.
The number 9 becomes the next digit in our result. 
Result so far: 39563.769
If we take 3789 away from 4040, we end up with 251.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

Advancing to step 12:
2510 divided by 421 is 5 with a remainder of 405.
Write down 5 as next digit of the result. 
Result so far: 39563.7695
If we take 2105 away from 2510, we end up with 405.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4050, and continue the process.

Step 13:
When dividing 4050 by 421, we get 9 with a remainder of 261.
Record the quotient 9 as the next digit in the result. 
Result so far: 39563.76959
The remainder is 261 after subtracting 3789 from 4050.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2610, and continue the process.

Moving on to step 14:
2610 divided by 421 is 6 with a remainder of 84.
The next digit of our result is 6. 
Result so far: 39563.769596
If we take 2526 away from 2610, we end up with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Moving on to step 15:
421 can be fit into 840 1 times, resulting in a remainder of 419.
The next digit of our result is 1. 
Result so far: 39563.7695961
If we take 421 away from 840, we end up with 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4190, and continue the process.

Advancing to step 16:
The number 421 fits into 4190 9 times, leaving a remainder of 401.
Put 9 as the next digit of the answer. 
Result so far: 39563.76959619
If we subtract 3789 from 4190, we get 401.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4010, and continue the process.

The quotient of the division is 39563.76959619, and the remainder is 4.01e-07.