Sure thing! We've got 305 and we're gonna multiply it by 20. That's the same as adding 305 to itself 20 times.
Step 1: 0 + 305 = 305
Step 2: 305 + 305 = 610
Step 3: 610 + 305 = 915
Step 4: 915 + 305 = 1220
Step 5: 1220 + 305 = 1525
Step 6: 1525 + 305 = 1830
Step 7: 1830 + 305 = 2135
Step 8: 2135 + 305 = 2440
Step 9: 2440 + 305 = 2745
Step 10: 2745 + 305 = 3050
Step 11: 3050 + 305 = 3355
Step 12: 3355 + 305 = 3660
Step 13: 3660 + 305 = 3965
Step 14: 3965 + 305 = 4270
Step 15: 4270 + 305 = 4575
Step 16: 4575 + 305 = 4880
Step 17: 4880 + 305 = 5185
Step 18: 5185 + 305 = 5490
Step 19: 5490 + 305 = 5795
Step 20: 5795 + 305 = 6100

So, 305*20 = 6100