Let's divide 13121901 by 437
Let's see how many times 437 fits into 13121901.

Advancing to step 1:
437 can be fit into 1 0 times, resulting in a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 437

Advancing to step 2:
437 can be fit into 13 0 times, resulting in a remainder of 13.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Fetch the next digit (1) from the dividend, attach it to 13 and continue: 131 / 437

Step 3:
If we divide 131 by 437, we get 0 and a remainder of 131.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 131, we end up with 131.
Bring next digit (2) of the dividend behind the 131 and repeat the process: 1312 / 437

On to step 4:
437 can be fit into 1312 3 times, resulting in a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 1 after subtracting 1311 from 1312.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 437

Moving on to step 5:
11 divided by 437 is 0 with a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 30.0
Deduct 0 from 11 and we're left with 11.
Append the next digit (9) from the dividend to 11 and continue with: 119 / 437

On to step 6:
437 can be fit into 119 0 times, resulting in a remainder of 119.
The next digit of our result is 0. 
Result so far: 300.0
If we take 0 away from 119, we end up with 119.
Include the next digit (0) from the dividend after 119, then repeat: 1190 / 437

Moving on to step 7:
1190 divided by 437 is 2 with a remainder of 316.
Put 2 as the next digit of the answer. 
Result so far: 3002.0
If we subtract 874 from 1190, we get 316.
Bring next digit (1) of the dividend behind the 316 and repeat the process: 3161 / 437

Moving on to step 8:
437 can be fit into 3161 7 times, resulting in a remainder of 102.
Use 7 as the next digit of our solution. 
Result so far: 30027.0
Subtracting 3059 from 3161 leaves us with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Advancing to step 9:
437 can be fit into 1020 2 times, resulting in a remainder of 146.
Use 2 as the next digit of our solution. 
Result so far: 30027.2
The remainder is 146 after subtracting 874 from 1020.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1460, and continue the process.

Let's proceed to step 10:
437 goes into 1460 3 times with a remainder of 149.
Write down 3 as next digit of the result. 
Result so far: 30027.23
The remainder is 149 after subtracting 1311 from 1460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1490, and continue the process.

On to step 11:
If we divide 1490 by 437, we get 3 and a remainder of 179.
Record the quotient 3 as the next digit in the result. 
Result so far: 30027.233
If we take 1311 away from 1490, we end up with 179.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1790, and continue the process.

The quotient of the division is 30027.233, and the remainder is 0.0179.