Let's get this math done. We have 977 and we're going to multiply it by 4. This is the same as taking 977 and adding it to itself 4 times.
Step 1: 0 + 977 = 977
Step 2: 977 + 977 = 1954
Step 3: 1954 + 977 = 2931
Step 4: 2931 + 977 = 3908

So, 977*4 = 3908