OK, let's crack this. We're given 23 and our task is to multiply it by 7. Essentially, we'll be adding 23 to itself 7 times.
Step 1: 0 + 23 = 23
Step 2: 23 + 23 = 46
Step 3: 46 + 23 = 69
Step 4: 69 + 23 = 92
Step 5: 92 + 23 = 115
Step 6: 115 + 23 = 138
Step 7: 138 + 23 = 161

So, 23*7 = 161