2161961 ÷ 578 
Our goal is to divide 2161961 by 578.

Moving on to step 1:
When dividing 2 by 578, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Grab the next digit (1) from the dividend, add it to 2, then carry on: 21 / 578

On to step 2:
21 divided by 578 is 0 with a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Grab the next digit (6) from the dividend, add it to 21, then carry on: 216 / 578

On to step 3:
216 divided by 578 is 0 with a remainder of 216.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 216 leaves us with 216.
Take the next digit (1) from the dividend and append it to 216, then repeat: 2161 / 578

Step 4:
578 can be fit into 2161 3 times, resulting in a remainder of 427.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 1734 from 2161 to get 427.
Take the next digit (9) from the dividend and append it to 427, then repeat: 4279 / 578

Step 5:
4279 divided by 578 is 7 with a remainder of 233.
Put 7 as the next digit of the answer. 
Result so far: 37.0
If we take 4046 away from 4279, we end up with 233.
Grab the next digit (6) from the dividend, add it to 233, then carry on: 2336 / 578

Advancing to step 6:
The number 578 fits into 2336 4 times, leaving a remainder of 24.
Use 4 as the next digit of our solution. 
Result so far: 374.0
Subtracting 2312 from 2336 leaves us with 24.
Fetch the next digit (1) from the dividend, attach it to 24 and continue: 241 / 578

On to step 7:
When dividing 241 by 578, we get 0 with a remainder of 241.
Write down 0 as next digit of the result. 
Result so far: 3740.0
The remainder is 241 after subtracting 0 from 241.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2410, and continue the process.

Advancing to step 8:
578 can be fit into 2410 4 times, resulting in a remainder of 98.
Use 4 as the next digit of our solution. 
Result so far: 3740.4
The remainder is 98 after subtracting 2312 from 2410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Let's proceed to step 9:
When dividing 980 by 578, we get 1 with a remainder of 402.
Write down 1 as next digit of the result. 
Result so far: 3740.41
The remainder is 402 after subtracting 578 from 980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4020, and continue the process.

Advancing to step 10:
If we divide 4020 by 578, we get 6 and a remainder of 552.
Use 6 as the next digit of our solution. 
Result so far: 3740.416
If we subtract 3468 from 4020, we get 552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5520, and continue the process.

Step 11:
The number 578 fits into 5520 9 times, leaving a remainder of 318.
Write down 9 as next digit of the result. 
Result so far: 3740.4169
Deduct 5202 from 5520 and we're left with 318.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3180, and continue the process.

Going ahead to step 12:
578 goes into 3180 5 times with a remainder of 290.
The number 5 becomes the next digit in our result. 
Result so far: 3740.41695
Subtract 2890 from 3180 to 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.

Let's proceed to step 13:
The number 578 fits into 2900 5 times, leaving a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 3740.416955
Subtract 2890 from 2900 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Our division results in 3740.416955 with a remaining 1e-06.