12258420 divided by 974 
Our goal is to divide 12258420 by 974.

On to step 1:
1 divided by 974 is 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 974

Moving on to step 2:
When dividing 12 by 974, 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.
Include the next digit (2) from the dividend after 12, then repeat: 122 / 974

Let's proceed to step 3:
974 goes into 122 0 times with a remainder of 122.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 122, we end up with 122.
Bring next digit (5) of the dividend behind the 122 and repeat the process: 1225 / 974

Moving on to step 4:
974 goes into 1225 1 times with a remainder of 251.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 974 from 1225, we get 251.
Take the next digit (8) from the dividend and append it to 251, then repeat: 2518 / 974

Let's proceed to step 5:
The number 974 fits into 2518 2 times, leaving a remainder of 570.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we subtract 1948 from 2518, we get 570.
Fetch the next digit (4) from the dividend, attach it to 570 and continue: 5704 / 974

Advancing to step 6:
When dividing 5704 by 974, we get 5 with a remainder of 834.
The next digit of our result is 5. 
Result so far: 125.0
Subtracting 4870 from 5704 leaves us with 834.
Take the next digit (2) from the dividend and append it to 834, then repeat: 8342 / 974

Going ahead to step 7:
8342 divided by 974 is 8 with a remainder of 550.
The next digit of our result is 8. 
Result so far: 1258.0
Deduct 7792 from 8342 and we're left with 550.
Grab the next digit (0) from the dividend, add it to 550, then carry on: 5500 / 974

Step 8:
When dividing 5500 by 974, we get 5 with a remainder of 630.
Put 5 as the next digit of the answer. 
Result so far: 12585.0
If we take 4870 away from 5500, we end up with 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Going ahead to step 9:
974 can be fit into 6300 6 times, resulting in a remainder of 456.
The number 6 becomes the next digit in our result. 
Result so far: 12585.6
Subtracting 5844 from 6300 leaves us with 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Advancing to step 10:
974 goes into 4560 4 times with a remainder of 664.
Write down 4 as next digit of the result. 
Result so far: 12585.64
If we subtract 3896 from 4560, we get 664.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6640, and continue the process.

Step 11:
974 goes into 6640 6 times with a remainder of 796.
The number 6 becomes the next digit in our result. 
Result so far: 12585.646
If we take 5844 away from 6640, we end up with 796.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7960, and continue the process.

Step 12:
974 goes into 7960 8 times with a remainder of 168.
Record the quotient 8 as the next digit in the result. 
Result so far: 12585.6468
Subtracting 7792 from 7960 leaves us with 168.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1680, and continue the process.

Let's proceed to step 13:
If we divide 1680 by 974, we get 1 and a remainder of 706.
The number 1 becomes the next digit in our result. 
Result so far: 12585.64681
The remainder is 706 after subtracting 974 from 1680.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7060, and continue the process.

Step 14:
7060 divided by 974 is 7 with a remainder of 242.
The next digit of our result is 7. 
Result so far: 12585.646817
If we subtract 6818 from 7060, we get 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

Going ahead to step 15:
When dividing 2420 by 974, we get 2 with a remainder of 472.
The next digit of our result is 2. 
Result so far: 12585.6468172
The remainder is 472 after subtracting 1948 from 2420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

Step 16:
4720 divided by 974 is 4 with a remainder of 824.
The number 4 becomes the next digit in our result. 
Result so far: 12585.64681724
If we take 3896 away from 4720, we end up with 824.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8240, and continue the process.

The final outcome is 12585.64681724, with a leftover of 8.24e-07.