42525270 ÷ 403 
Our goal is to divide 42525270 by 403.

On to step 1:
4 divided by 403 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Fetch the next digit (2) from the dividend, attach it to 4 and continue: 42 / 403

On to step 2:
When dividing 42 by 403, we get 0 with a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Include the next digit (5) from the dividend after 42, then repeat: 425 / 403

Moving on to step 3:
403 can be fit into 425 1 times, resulting in a remainder of 22.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
The remainder is 22 after subtracting 403 from 425.
Grab the next digit (2) from the dividend, add it to 22, then carry on: 222 / 403

Step 4:
If we divide 222 by 403, we get 0 and a remainder of 222.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
The remainder is 222 after subtracting 0 from 222.
Append the next digit (5) from the dividend to 222 and continue with: 2225 / 403

Moving on to step 5:
When dividing 2225 by 403, we get 5 with a remainder of 210.
Record the quotient 5 as the next digit in the result. 
Result so far: 105.0
Subtracting 2015 from 2225 leaves us with 210.
Append the next digit (2) from the dividend to 210 and continue with: 2102 / 403

Going ahead to step 6:
403 can be fit into 2102 5 times, resulting in a remainder of 87.
The number 5 becomes the next digit in our result. 
Result so far: 1055.0
Subtracting 2015 from 2102 leaves us with 87.
Include the next digit (7) from the dividend after 87, then repeat: 877 / 403

Step 7:
If we divide 877 by 403, we get 2 and a remainder of 71.
The next digit of our result is 2. 
Result so far: 10552.0
Subtracting 806 from 877 leaves us with 71.
Append the next digit (0) from the dividend to 71 and continue with: 710 / 403

Step 8:
403 goes into 710 1 times with a remainder of 307.
Use 1 as the next digit of our solution. 
Result so far: 105521.0
If we take 403 away from 710, we end up with 307.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3070, and continue the process.

On to step 9:
If we divide 3070 by 403, we get 7 and a remainder of 249.
Record the quotient 7 as the next digit in the result. 
Result so far: 105521.7
If we take 2821 away from 3070, we end up with 249.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

Advancing to step 10:
403 can be fit into 2490 6 times, resulting in a remainder of 72.
The number 6 becomes the next digit in our result. 
Result so far: 105521.76
The remainder is 72 after subtracting 2418 from 2490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Advancing to step 11:
720 divided by 403 is 1 with a remainder of 317.
Write down 1 as next digit of the result. 
Result so far: 105521.761
Deduct 403 from 720 and we're left with 317.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3170, and continue the process.

Going ahead to step 12:
The number 403 fits into 3170 7 times, leaving a remainder of 349.
The number 7 becomes the next digit in our result. 
Result so far: 105521.7617
If we subtract 2821 from 3170, we get 349.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3490, and continue the process.

Advancing to step 13:
3490 divided by 403 is 8 with a remainder of 266.
Use 8 as the next digit of our solution. 
Result so far: 105521.76178
Subtracting 3224 from 3490 leaves us with 266.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2660, and continue the process.

Moving on to step 14:
If we divide 2660 by 403, we get 6 and a remainder of 242.
Record the quotient 6 as the next digit in the result. 
Result so far: 105521.761786
Subtracting 2418 from 2660 leaves us with 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

On to step 15:
403 can be fit into 2420 6 times, resulting in a remainder of 2.
Put 6 as the next digit of the answer. 
Result so far: 105521.7617866
Subtracting 2418 from 2420 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final outcome is 105521.7617866, with a leftover of 2e-08.