251423 ÷ 78 
Let's see how many times 78 fits into 251423.

Step 1:
2 divided by 78 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Fetch the next digit (5) from the dividend, attach it to 2 and continue: 25 / 78

Let's proceed to step 2:
25 divided by 78 is 0 with a remainder of 25.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 25, we get 25.
Take the next digit (1) from the dividend and append it to 25, then repeat: 251 / 78

Advancing to step 3:
251 divided by 78 is 3 with a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Deduct 234 from 251 and we're left with 17.
Grab the next digit (4) from the dividend, add it to 17, then carry on: 174 / 78

Going ahead to step 4:
The number 78 fits into 174 2 times, leaving a remainder of 18.
Put 2 as the next digit of the answer. 
Result so far: 32.0
Deduct 156 from 174 and we're left with 18.
Bring next digit (2) of the dividend behind the 18 and repeat the process: 182 / 78

On to step 5:
182 divided by 78 is 2 with a remainder of 26.
Write down 2 as next digit of the result. 
Result so far: 322.0
If we take 156 away from 182, we end up with 26.
Bring next digit (3) of the dividend behind the 26 and repeat the process: 263 / 78

Let's proceed to step 6:
If we divide 263 by 78, we get 3 and a remainder of 29.
Put 3 as the next digit of the answer. 
Result so far: 3223.0
The remainder is 29 after subtracting 234 from 263.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Going ahead to step 7:
290 divided by 78 is 3 with a remainder of 56.
Write down 3 as next digit of the result. 
Result so far: 3223.3
If we subtract 234 from 290, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 8:
The number 78 fits into 560 7 times, leaving a remainder of 14.
Record the quotient 7 as the next digit in the result. 
Result so far: 3223.37
Subtract 546 from 560 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 9:
When dividing 140 by 78, we get 1 with a remainder of 62.
Record the quotient 1 as the next digit in the result. 
Result so far: 3223.371
The remainder is 62 after subtracting 78 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 10:
The number 78 fits into 620 7 times, leaving a remainder of 74.
The number 7 becomes the next digit in our result. 
Result so far: 3223.3717
If we take 546 away from 620, we end up with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Let's proceed to step 11:
78 goes into 740 9 times with a remainder of 38.
Record the quotient 9 as the next digit in the result. 
Result so far: 3223.37179
If we take 702 away from 740, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 12:
When dividing 380 by 78, we get 4 with a remainder of 68.
Record the quotient 4 as the next digit in the result. 
Result so far: 3223.371794
If we subtract 312 from 380, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Let's proceed to step 13:
680 divided by 78 is 8 with a remainder of 56.
Put 8 as the next digit of the answer. 
Result so far: 3223.3717948
Subtracting 624 from 680 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 14:
560 divided by 78 is 7 with a remainder of 14.
The next digit of our result is 7. 
Result so far: 3223.37179487
If we take 546 away from 560, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 3223.37179487, with a leftover of 1.4e-08.