OK, let's work through this together. We're starting with 65 and we're going to multiply it by 20, which means we add 65 to itself 20 times.
Step 1: 0 + 65 = 65
Step 2: 65 + 65 = 130
Step 3: 130 + 65 = 195
Step 4: 195 + 65 = 260
Step 5: 260 + 65 = 325
Step 6: 325 + 65 = 390
Step 7: 390 + 65 = 455
Step 8: 455 + 65 = 520
Step 9: 520 + 65 = 585
Step 10: 585 + 65 = 650
Step 11: 650 + 65 = 715
Step 12: 715 + 65 = 780
Step 13: 780 + 65 = 845
Step 14: 845 + 65 = 910
Step 15: 910 + 65 = 975
Step 16: 975 + 65 = 1040
Step 17: 1040 + 65 = 1105
Step 18: 1105 + 65 = 1170
Step 19: 1170 + 65 = 1235
Step 20: 1235 + 65 = 1300

So, 65*20 = 1300