12060670 ÷ 21 
We're looking to find how many times 21 goes into 12060670.

Advancing to step 1:
21 goes into 1 0 times with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 21

Moving on to step 2:
When dividing 12 by 21, we get 0 with a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Fetch the next digit (0) from the dividend, attach it to 12 and continue: 120 / 21

Going ahead to step 3:
21 goes into 120 5 times with a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we subtract 105 from 120, we get 15.
Append the next digit (6) from the dividend to 15 and continue with: 156 / 21

Let's proceed to step 4:
If we divide 156 by 21, we get 7 and a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 57.0
If we subtract 147 from 156, we get 9.
Include the next digit (0) from the dividend after 9, then repeat: 90 / 21

Step 5:
When dividing 90 by 21, we get 4 with a remainder of 6.
Use 4 as the next digit of our solution. 
Result so far: 574.0
Subtract 84 from 90 to get 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 21

Advancing to step 6:
66 divided by 21 is 3 with a remainder of 3.
The number 3 becomes the next digit in our result. 
Result so far: 5743.0
If we subtract 63 from 66, we get 3.
Append the next digit (7) from the dividend to 3 and continue with: 37 / 21

Advancing to step 7:
37 divided by 21 is 1 with a remainder of 16.
Record the quotient 1 as the next digit in the result. 
Result so far: 57431.0
Deduct 21 from 37 and we're left with 16.
Fetch the next digit (0) from the dividend, attach it to 16 and continue: 160 / 21

Step 8:
When dividing 160 by 21, we get 7 with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 574317.0
If we take 147 away from 160, we end up 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.

Going ahead to step 9:
If we divide 130 by 21, we get 6 and a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 574317.6
The remainder is 4 after subtracting 126 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 10:
The number 21 fits into 40 1 times, leaving a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 574317.61
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.

On to step 11:
The number 21 fits into 190 9 times, leaving a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 574317.619
If we take 189 away from 190, we end up 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.

Let's proceed to step 12:
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: 574317.619
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 13:
21 can be fit into 100 4 times, resulting in a remainder of 16.
The number 4 becomes the next digit in our result. 
Result so far: 574317.61904
Subtracting 84 from 100 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 14:
The number 21 fits into 160 7 times, leaving a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 574317.619047
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.

Let's proceed to step 15:
21 goes into 130 6 times with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 574317.6190476
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 16:
When dividing 40 by 21, we get 1 with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 574317.61904761
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 quotient of the division is 574317.61904761, and the remainder is 1.9e-08.