39370 ÷ 90 
We're looking to find how many times 90 goes into 39370.

Step 1:
If we divide 3 by 90, we get 0 and a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 90

Advancing to step 2:
90 can be fit into 39 0 times, resulting in a remainder of 39.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Append the next digit (3) from the dividend to 39 and continue with: 393 / 90

Moving on to step 3:
90 goes into 393 4 times with a remainder of 33.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 360 from 393, we get 33.
Append the next digit (7) from the dividend to 33 and continue with: 337 / 90

Going ahead to step 4:
90 goes into 337 3 times with a remainder of 67.
Put 3 as the next digit of the answer. 
Result so far: 43.0
If we subtract 270 from 337, we get 67.
Include the next digit (0) from the dividend after 67, then repeat: 670 / 90

Step 5:
90 goes into 670 7 times with a remainder of 40.
Put 7 as the next digit of the answer. 
Result so far: 437.0
If we take 630 away from 670, 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.

Step 6:
90 goes into 400 4 times with a remainder of 40.
Use 4 as the next digit of our solution. 
Result so far: 437.4
Deduct 360 from 400 and we're left 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.

Advancing to step 7:
90 can be fit into 400 4 times, resulting in a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 437.44
If we take 360 away from 400, 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.

Our division results in 437.44 with a remaining 0.04.