To better understand EVM, I build an EVM interpretor from scratch while reading the Ethereum yellow paper.
$ python main.py 600660070260005360016000f3
[*] EVM starts running
PUSH1 @ pc=0
stack: [6]
memory: []
PUSH1 @ pc=2
stack: [6, 7]
memory: []
MUL @ pc=4
stack: [42]
memory: []
PUSH1 @ pc=5
stack: [42, 0]
memory: []
MSTORE8 @ pc=7
stack: []
memory: [42]
PUSH1 @ pc=8
stack: [1]
memory: [42]
PUSH1 @ pc=10
stack: [1, 0]
memory: [42]
RETURN @ pc=12
stack: []
memory: [42]
Output: 0x2a