Let's divide 91861006 by 420
We want to figure out the number of times 91861006 can be divided by 420.

Step 1:
When dividing 9 by 420, we get 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 420

Step 2:
91 divided by 420 is 0 with a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 91 leaves us with 91.
Fetch the next digit (8) from the dividend, attach it to 91 and continue: 918 / 420

Advancing to step 3:
420 goes into 918 2 times with a remainder of 78.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we take 840 away from 918, we end up with 78.
Bring next digit (6) of the dividend behind the 78 and repeat the process: 786 / 420

On to step 4:
The number 420 fits into 786 1 times, leaving a remainder of 366.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
Deduct 420 from 786 and we're left with 366.
Append the next digit (1) from the dividend to 366 and continue with: 3661 / 420

Advancing to step 5:
420 can be fit into 3661 8 times, resulting in a remainder of 301.
Put 8 as the next digit of the answer. 
Result so far: 218.0
If we subtract 3360 from 3661, we get 301.
Grab the next digit (0) from the dividend, add it to 301, then carry on: 3010 / 420

Moving on to step 6:
The number 420 fits into 3010 7 times, leaving a remainder of 70.
Write down 7 as next digit of the result. 
Result so far: 2187.0
Subtracting 2940 from 3010 leaves us with 70.
Include the next digit (0) from the dividend after 70, then repeat: 700 / 420

Advancing to step 7:
700 divided by 420 is 1 with a remainder of 280.
The next digit of our result is 1. 
Result so far: 21871.0
If we take 420 away from 700, we end up with 280.
Fetch the next digit (6) from the dividend, attach it to 280 and continue: 2806 / 420

Let's proceed to step 8:
420 goes into 2806 6 times with a remainder of 286.
Write down 6 as next digit of the result. 
Result so far: 218716.0
If we take 2520 away from 2806, we end up with 286.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2860, and continue the process.

Let's proceed to step 9:
420 goes into 2860 6 times with a remainder of 340.
The number 6 becomes the next digit in our result. 
Result so far: 218716.6
If we subtract 2520 from 2860, we get 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

Step 10:
The number 420 fits into 3400 8 times, leaving a remainder of 40.
Record the quotient 8 as the next digit in the result. 
Result so far: 218716.68
If we take 3360 away from 3400, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Let's proceed to step 11:
420 can be fit into 400 0 times, resulting in a remainder of 400.
The next digit of our result is 0. 
Result so far: 218716.68
Subtract 0 from 400 to get 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

Going ahead to step 12:
420 goes into 4000 9 times with a remainder of 220.
Record the quotient 9 as the next digit in the result. 
Result so far: 218716.6809
Subtract 3780 from 4000 to get 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

On to step 13:
2200 divided by 420 is 5 with a remainder of 100.
The next digit of our result is 5. 
Result so far: 218716.68095
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.

Step 14:
When dividing 1000 by 420, we get 2 with a remainder of 160.
Put 2 as the next digit of the answer. 
Result so far: 218716.680952
If we subtract 840 from 1000, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Advancing to step 15:
If we divide 1600 by 420, we get 3 and a remainder of 340.
Record the quotient 3 as the next digit in the result. 
Result so far: 218716.6809523
Subtracting 1260 from 1600 leaves us with 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3400, and continue the process.

On to step 16:
420 goes into 3400 8 times with a remainder of 40.
The number 8 becomes the next digit in our result. 
Result so far: 218716.68095238
The remainder is 40 after subtracting 3360 from 3400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

In conclusion, the division gives 218716.68095238 with a balance of 4e-08.