78401273 ÷ 426 
The aim is to understand the frequency of 426 in 78401273.

On to step 1:
If we divide 7 by 426, we get 0 and a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 426

Step 2:
426 can be fit into 78 0 times, resulting in a remainder of 78.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Take the next digit (4) from the dividend and append it to 78, then repeat: 784 / 426

Going ahead to step 3:
When dividing 784 by 426, we get 1 with a remainder of 358.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtract 426 from 784 to get 358.
Fetch the next digit (0) from the dividend, attach it to 358 and continue: 3580 / 426

Going ahead to step 4:
When dividing 3580 by 426, we get 8 with a remainder of 172.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
Deduct 3408 from 3580 and we're left with 172.
Take the next digit (1) from the dividend and append it to 172, then repeat: 1721 / 426

Moving on to step 5:
The number 426 fits into 1721 4 times, leaving a remainder of 17.
Record the quotient 4 as the next digit in the result. 
Result so far: 184.0
If we take 1704 away from 1721, we end up with 17.
Grab the next digit (2) from the dividend, add it to 17, then carry on: 172 / 426

On to step 6:
426 can be fit into 172 0 times, resulting in a remainder of 172.
Use 0 as the next digit of our solution. 
Result so far: 1840.0
Subtract 0 from 172 to get 172.
Take the next digit (7) from the dividend and append it to 172, then repeat: 1727 / 426

On to step 7:
The number 426 fits into 1727 4 times, leaving a remainder of 23.
Use 4 as the next digit of our solution. 
Result so far: 18404.0
Deduct 1704 from 1727 and we're left with 23.
Include the next digit (3) from the dividend after 23, then repeat: 233 / 426

Advancing to step 8:
426 goes into 233 0 times with a remainder of 233.
Put 0 as the next digit of the answer. 
Result so far: 184040.0
The remainder is 233 after subtracting 0 from 233.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2330, and continue the process.

Advancing to step 9:
2330 divided by 426 is 5 with a remainder of 200.
Use 5 as the next digit of our solution. 
Result so far: 184040.5
Subtract 2130 from 2330 to get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

Let's proceed to step 10:
426 goes into 2000 4 times with a remainder of 296.
Put 4 as the next digit of the answer. 
Result so far: 184040.54
Deduct 1704 from 2000 and we're left with 296.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2960, and continue the process.

Moving on to step 11:
426 can be fit into 2960 6 times, resulting in a remainder of 404.
Record the quotient 6 as the next digit in the result. 
Result so far: 184040.546
Subtracting 2556 from 2960 leaves us with 404.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4040, and continue the process.

Let's proceed to step 12:
The number 426 fits into 4040 9 times, leaving a remainder of 206.
The next digit of our result is 9. 
Result so far: 184040.5469
Deduct 3834 from 4040 and we're left with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Step 13:
2060 divided by 426 is 4 with a remainder of 356.
Use 4 as the next digit of our solution. 
Result so far: 184040.54694
If we subtract 1704 from 2060, we get 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

Moving on to step 14:
426 goes into 3560 8 times with a remainder of 152.
Use 8 as the next digit of our solution. 
Result so far: 184040.546948
Deduct 3408 from 3560 and we're left with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Step 15:
426 can be fit into 1520 3 times, resulting in a remainder of 242.
The number 3 becomes the next digit in our result. 
Result so far: 184040.5469483
If we take 1278 away from 1520, we end up 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.

Step 16:
The number 426 fits into 2420 5 times, leaving a remainder of 290.
The next digit of our result is 5. 
Result so far: 184040.54694835
If we subtract 2130 from 2420, we get 290.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2900, and continue the process.

The quotient of the division is 184040.54694835, and the remainder is 2.9e-07.