Sure thing, let's get straight to it. We start with 145 and we're going to multiply it by 6, which means adding 145 to itself 6 times.
Step 1: 0 + 145 = 145
Step 2: 145 + 145 = 290
Step 3: 290 + 145 = 435
Step 4: 435 + 145 = 580
Step 5: 580 + 145 = 725
Step 6: 725 + 145 = 870

So, 145*6 = 870