9850012 ÷ 21 
Our goal is to divide 9850012 by 21.

Going ahead to step 1:
21 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Grab the next digit (8) from the dividend, add it to 9, then carry on: 98 / 21

Advancing to step 2:
The number 21 fits into 98 4 times, leaving a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Deduct 84 from 98 and we're left with 14.
Fetch the next digit (5) from the dividend, attach it to 14 and continue: 145 / 21

Advancing to step 3:
21 can be fit into 145 6 times, resulting in a remainder of 19.
Record the quotient 6 as the next digit in the result. 
Result so far: 46.0
If we subtract 126 from 145, we get 19.
Take the next digit (0) from the dividend and append it to 19, then repeat: 190 / 21

On to step 4:
190 divided by 21 is 9 with a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 469.0
If we take 189 away from 190, we end up with 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 21

On to step 5:
10 divided by 21 is 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 4690.0
If we take 0 away from 10, we end up with 10.
Take the next digit (1) from the dividend and append it to 10, then repeat: 101 / 21

Let's proceed to step 6:
21 goes into 101 4 times with a remainder of 17.
Record the quotient 4 as the next digit in the result. 
Result so far: 46904.0
Subtract 84 from 101 to get 17.
Include the next digit (2) from the dividend after 17, then repeat: 172 / 21

On to step 7:
If we divide 172 by 21, we get 8 and a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 469048.0
Subtracting 168 from 172 leaves us 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.
Write down 1 as next digit of the result. 
Result so far: 469048.1
Subtracting 21 from 40 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 9:
21 goes into 190 9 times with a remainder of 1.
The next digit of our result is 9. 
Result so far: 469048.19
Subtracting 189 from 190 leaves us with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 10:
The number 21 fits into 10 0 times, leaving a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 469048.19
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 11:
If we divide 100 by 21, we get 4 and a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 469048.1904
If we subtract 84 from 100, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

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: 469048.19047
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 13:
The number 21 fits into 130 6 times, leaving a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 469048.190476
Subtract 126 from 130 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 14:
When dividing 40 by 21, we get 1 with a remainder of 19.
The next digit of our result is 1. 
Result so far: 469048.1904761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 15:
21 goes into 190 9 times with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 469048.19047619
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 469048.19047619, with a leftover of 1e-09.