Sure thing, let's get straight to it. We start with 86 and we're going to multiply it by 4, which means adding 86 to itself 4 times.
Step 1: 0 + 86 = 86
Step 2: 86 + 86 = 172
Step 3: 172 + 86 = 258
Step 4: 258 + 86 = 344

So, 86*4 = 344