Let's divide 507873 by 12
We want to divide 507873 by 12.

Advancing to step 1:
When dividing 5 by 12, we get 0 with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 12

Going ahead to step 2:
When dividing 50 by 12, we get 4 with a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 48 from 50 and we're left with 2.
Grab the next digit (7) from the dividend, add it to 2, then carry on: 27 / 12

Step 3:
When dividing 27 by 12, we get 2 with a remainder of 3.
Put 2 as the next digit of the answer. 
Result so far: 42.0
Subtract 24 from 27 to get 3.
Fetch the next digit (8) from the dividend, attach it to 3 and continue: 38 / 12

Advancing to step 4:
If we divide 38 by 12, we get 3 and a remainder of 2.
The number 3 becomes the next digit in our result. 
Result so far: 423.0
If we take 36 away from 38, we end up with 2.
Fetch the next digit (7) from the dividend, attach it to 2 and continue: 27 / 12

Going ahead to step 5:
27 divided by 12 is 2 with a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 4232.0
If we subtract 24 from 27, we get 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 12

Advancing to step 6:
12 goes into 33 2 times with a remainder of 9.
Record the quotient 2 as the next digit in the result. 
Result so far: 42322.0
Deduct 24 from 33 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 7:
The number 12 fits into 90 7 times, leaving a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 42322.7
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 8:
The number 12 fits into 60 5 times, leaving a remainder of 0.
The next digit of our result is 5. 
Result so far: 42322.75
Subtract 60 from 60 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 9:
12 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 42322.75
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
12 can be fit into 0 0 times, resulting in a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 42322.75
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 42322.75, with a leftover of 0.0.