Let's divide 53985171 by 428
Our goal is to divide 53985171 by 428.

On to step 1:
428 goes into 5 0 times with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 428

Step 2:
When dividing 53 by 428, we get 0 with a remainder of 53.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 53 and we're left with 53.
Bring next digit (9) of the dividend behind the 53 and repeat the process: 539 / 428

Advancing to step 3:
The number 428 fits into 539 1 times, leaving a remainder of 111.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 428 from 539 leaves us with 111.
Append the next digit (8) from the dividend to 111 and continue with: 1118 / 428

Moving on to step 4:
When dividing 1118 by 428, we get 2 with a remainder of 262.
The next digit of our result is 2. 
Result so far: 12.0
Subtracting 856 from 1118 leaves us with 262.
Grab the next digit (5) from the dividend, add it to 262, then carry on: 2625 / 428

Let's proceed to step 5:
2625 divided by 428 is 6 with a remainder of 57.
Use 6 as the next digit of our solution. 
Result so far: 126.0
Subtract 2568 from 2625 to get 57.
Bring next digit (1) of the dividend behind the 57 and repeat the process: 571 / 428

Moving on to step 6:
The number 428 fits into 571 1 times, leaving a remainder of 143.
The number 1 becomes the next digit in our result. 
Result so far: 1261.0
Subtracting 428 from 571 leaves us with 143.
Bring next digit (7) of the dividend behind the 143 and repeat the process: 1437 / 428

Advancing to step 7:
The number 428 fits into 1437 3 times, leaving a remainder of 153.
The number 3 becomes the next digit in our result. 
Result so far: 12613.0
If we subtract 1284 from 1437, we get 153.
Include the next digit (1) from the dividend after 153, then repeat: 1531 / 428

Let's proceed to step 8:
When dividing 1531 by 428, we get 3 with a remainder of 247.
The number 3 becomes the next digit in our result. 
Result so far: 126133.0
Deduct 1284 from 1531 and we're left with 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

On to step 9:
2470 divided by 428 is 5 with a remainder of 330.
Record the quotient 5 as the next digit in the result. 
Result so far: 126133.5
The remainder is 330 after subtracting 2140 from 2470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3300, and continue the process.

Moving on to step 10:
428 goes into 3300 7 times with a remainder of 304.
Write down 7 as next digit of the result. 
Result so far: 126133.57
Deduct 2996 from 3300 and we're left with 304.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3040, and continue the process.

Advancing to step 11:
The number 428 fits into 3040 7 times, leaving a remainder of 44.
Write down 7 as next digit of the result. 
Result so far: 126133.577
If we take 2996 away from 3040, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

After the division, we end up with 126133.577 and a remainder of 0.0044.