64023 ÷ 7 = 9146 R1
We're going to perform division on 64023 with 7 as the divisor.

Step 1:
7 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of of the result. 
Result so far: 0
Subtract 0 from 6 to get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 7

Step 2:
7 goes into 64 9 times with a remainder of 1.
Write down 9 as next digit of of the result. 
Result so far: 9
Subtract 63 from 64 to get 1.
Bring next digit (0) of the dividend behind the 1 and repeat the process: 10 / 7

Step 3:
7 goes into 10 1 times with a remainder of 3.
Write down 1 as next digit of of the result. 
Result so far: 91
Subtract 7 from 10 to get 3.
Bring next digit (2) of the dividend behind the 3 and repeat the process: 32 / 7

Step 4:
7 goes into 32 4 times with a remainder of 4.
Write down 4 as next digit of of the result. 
Result so far: 914
Subtract 28 from 32 to get 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 7

Step 5:
7 goes into 43 6 times with a remainder of 1.
Write down 6 as next digit of of the result. 
Result so far: 9146
Subtract 42 from 43 to get 1.

The final result is 9146 with a remainder of 1.