120351 ÷ 75 
We're looking to find how many times 75 goes into 120351.

Advancing to step 1:
75 goes into 1 0 times with a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Bring next digit (2) of the dividend behind the 1 and repeat the process: 12 / 75

Moving on to step 2:
12 divided by 75 is 0 with a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Grab the next digit (0) from the dividend, add it to 12, then carry on: 120 / 75

Going ahead to step 3:
120 divided by 75 is 1 with a remainder of 45.
The next digit of our result is 1. 
Result so far: 1.0
If we take 75 away from 120, we end up with 45.
Take the next digit (3) from the dividend and append it to 45, then repeat: 453 / 75

Advancing to step 4:
If we divide 453 by 75, we get 6 and a remainder of 3.
Put 6 as the next digit of the answer. 
Result so far: 16.0
If we subtract 450 from 453, we get 3.
Fetch the next digit (5) from the dividend, attach it to 3 and continue: 35 / 75

On to step 5:
If we divide 35 by 75, we get 0 and a remainder of 35.
Write down 0 as next digit of the result. 
Result so far: 160.0
Subtract 0 from 35 to get 35.
Fetch the next digit (1) from the dividend, attach it to 35 and continue: 351 / 75

Step 6:
75 can be fit into 351 4 times, resulting in a remainder of 51.
The number 4 becomes the next digit in our result. 
Result so far: 1604.0
If we take 300 away from 351, we end up with 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Moving on to step 7:
75 can be fit into 510 6 times, resulting in a remainder of 60.
Record the quotient 6 as the next digit in the result. 
Result so far: 1604.6
Deduct 450 from 510 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 8:
600 divided by 75 is 8 with a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 1604.68
Deduct 600 from 600 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.

On to step 9:
75 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 1604.68
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.

Advancing to step 10:
The number 75 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 1604.68
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.

After the division, we end up with 1604.68 and a remainder of 0.0.