53637900 ÷ 420 
We're looking to find how many times 420 goes into 53637900.

Step 1:
420 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
If we subtract 0 from 5, we get 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 420

Moving on to step 2:
When dividing 53 by 420, we get 0 with a remainder of 53.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 53 and we're left with 53.
Fetch the next digit (6) from the dividend, attach it to 53 and continue: 536 / 420

Advancing to step 3:
420 goes into 536 1 times with a remainder of 116.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 116 after subtracting 420 from 536.
Append the next digit (3) from the dividend to 116 and continue with: 1163 / 420

Going ahead to step 4:
420 goes into 1163 2 times with a remainder of 323.
Use 2 as the next digit of our solution. 
Result so far: 12.0
If we subtract 840 from 1163, we get 323.
Include the next digit (7) from the dividend after 323, then repeat: 3237 / 420

Moving on to step 5:
The number 420 fits into 3237 7 times, leaving a remainder of 297.
Put 7 as the next digit of the answer. 
Result so far: 127.0
The remainder is 297 after subtracting 2940 from 3237.
Bring next digit (9) of the dividend behind the 297 and repeat the process: 2979 / 420

Step 6:
2979 divided by 420 is 7 with a remainder of 39.
Record the quotient 7 as the next digit in the result. 
Result so far: 1277.0
If we take 2940 away from 2979, we end up with 39.
Append the next digit (0) from the dividend to 39 and continue with: 390 / 420

Moving on to step 7:
When dividing 390 by 420, we get 0 with a remainder of 390.
The next digit of our result is 0. 
Result so far: 12770.0
If we take 0 away from 390, we end up with 390.
Take the next digit (0) from the dividend and append it to 390, then repeat: 3900 / 420

Advancing to step 8:
The number 420 fits into 3900 9 times, leaving a remainder of 120.
Write down 9 as next digit of the result. 
Result so far: 127709.0
The remainder is 120 after subtracting 3780 from 3900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

On to step 9:
420 goes into 1200 2 times with a remainder of 360.
The next digit of our result is 2. 
Result so far: 127709.2
Subtract 840 from 1200 to get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Let's proceed to step 10:
If we divide 3600 by 420, we get 8 and a remainder of 240.
Write down 8 as next digit of the result. 
Result so far: 127709.28
The remainder is 240 after subtracting 3360 from 3600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Let's proceed to step 11:
420 can be fit into 2400 5 times, resulting in a remainder of 300.
The number 5 becomes the next digit in our result. 
Result so far: 127709.285
If we subtract 2100 from 2400, we get 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3000, and continue the process.

On to step 12:
3000 divided by 420 is 7 with a remainder of 60.
Write down 7 as next digit of the result. 
Result so far: 127709.2857
Subtracting 2940 from 3000 leaves us 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.

Advancing to step 13:
420 goes into 600 1 times with a remainder of 180.
Write down 1 as next digit of the result. 
Result so far: 127709.28571
If we subtract 420 from 600, we get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Moving on to step 14:
420 goes into 1800 4 times with a remainder of 120.
Put 4 as the next digit of the answer. 
Result so far: 127709.285714
Deduct 1680 from 1800 and we're left with 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

Step 15:
The number 420 fits into 1200 2 times, leaving a remainder of 360.
The number 2 becomes the next digit in our result. 
Result so far: 127709.2857142
If we subtract 840 from 1200, we get 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Let's proceed to step 16:
420 goes into 3600 8 times with a remainder of 240.
Put 8 as the next digit of the answer. 
Result so far: 127709.28571428
The remainder is 240 after subtracting 3360 from 3600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

The final result is 127709.28571428 with a remainder of 2.4e-07.