63712552 ÷ 420 
We're looking to find how many times 420 goes into 63712552.

Step 1:
420 can be fit into 6 0 times, resulting in a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Include the next digit (3) from the dividend after 6, then repeat: 63 / 420

Advancing to step 2:
63 divided by 420 is 0 with a remainder of 63.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 63, we get 63.
Include the next digit (7) from the dividend after 63, then repeat: 637 / 420

Going ahead to step 3:
420 can be fit into 637 1 times, resulting in a remainder of 217.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 420 from 637 and we're left with 217.
Include the next digit (1) from the dividend after 217, then repeat: 2171 / 420

On to step 4:
420 can be fit into 2171 5 times, resulting in a remainder of 71.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
If we take 2100 away from 2171, we end up with 71.
Grab the next digit (2) from the dividend, add it to 71, then carry on: 712 / 420

Advancing to step 5:
420 can be fit into 712 1 times, resulting in a remainder of 292.
Put 1 as the next digit of the answer. 
Result so far: 151.0
If we take 420 away from 712, we end up with 292.
Include the next digit (5) from the dividend after 292, then repeat: 2925 / 420

On to step 6:
When dividing 2925 by 420, we get 6 with a remainder of 405.
Write down 6 as next digit of the result. 
Result so far: 1516.0
If we subtract 2520 from 2925, we get 405.
Fetch the next digit (5) from the dividend, attach it to 405 and continue: 4055 / 420

Going ahead to step 7:
When dividing 4055 by 420, we get 9 with a remainder of 275.
The next digit of our result is 9. 
Result so far: 15169.0
If we take 3780 away from 4055, we end up with 275.
Fetch the next digit (2) from the dividend, attach it to 275 and continue: 2752 / 420

Step 8:
420 can be fit into 2752 6 times, resulting in a remainder of 232.
The number 6 becomes the next digit in our result. 
Result so far: 151696.0
Subtract 2520 from 2752 to get 232.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Moving on to step 9:
2320 divided by 420 is 5 with a remainder of 220.
Record the quotient 5 as the next digit in the result. 
Result so far: 151696.5
Subtracting 2100 from 2320 leaves us with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

Let's proceed to step 10:
2200 divided by 420 is 5 with a remainder of 100.
Use 5 as the next digit of our solution. 
Result so far: 151696.55
Subtract 2100 from 2200 to get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

The final outcome is 151696.55, with a leftover of 0.1.