347458 divided by 21 
We want to divide 347458 by 21.

Let's proceed to step 1:
If we divide 3 by 21, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Grab the next digit (4) from the dividend, add it to 3, then carry on: 34 / 21

Let's proceed to step 2:
The number 21 fits into 34 1 times, leaving a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 21 from 34 to get 13.
Take the next digit (7) from the dividend and append it to 13, then repeat: 137 / 21

Going ahead to step 3:
The number 21 fits into 137 6 times, leaving a remainder of 11.
The next digit of our result is 6. 
Result so far: 16.0
If we take 126 away from 137, we end up with 11.
Grab the next digit (4) from the dividend, add it to 11, then carry on: 114 / 21

Let's proceed to step 4:
If we divide 114 by 21, we get 5 and a remainder of 9.
Record the quotient 5 as the next digit in the result. 
Result so far: 165.0
Subtracting 105 from 114 leaves us with 9.
Take the next digit (5) from the dividend and append it to 9, then repeat: 95 / 21

Step 5:
95 divided by 21 is 4 with a remainder of 11.
The number 4 becomes the next digit in our result. 
Result so far: 1654.0
Subtract 84 from 95 to get 11.
Append the next digit (8) from the dividend to 11 and continue with: 118 / 21

Step 6:
If we divide 118 by 21, we get 5 and a remainder of 13.
Use 5 as the next digit of our solution. 
Result so far: 16545.0
Subtracting 105 from 118 leaves us with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 7:
21 goes into 130 6 times with a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 16545.6
Deduct 126 from 130 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 8:
21 can be fit into 40 1 times, resulting in a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 16545.61
If we subtract 21 from 40, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 9:
21 can be fit into 190 9 times, resulting in a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 16545.619
Subtract 189 from 190 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 10:
If we divide 10 by 21, we get 0 and a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 16545.619
If we subtract 0 from 10, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 11:
The number 21 fits into 100 4 times, leaving a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 16545.61904
The remainder is 16 after subtracting 84 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 12:
160 divided by 21 is 7 with a remainder of 13.
Use 7 as the next digit of our solution. 
Result so far: 16545.619047
The remainder is 13 after subtracting 147 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Going ahead to step 13:
21 can be fit into 130 6 times, resulting in a remainder of 4.
Write down 6 as next digit of the result. 
Result so far: 16545.6190476
If we take 126 away from 130, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 14:
40 divided by 21 is 1 with a remainder of 19.
The next digit of our result is 1. 
Result so far: 16545.61904761
Subtract 21 from 40 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

The final outcome is 16545.61904761, with a leftover of 1.9e-08.