Let's roll up our sleeves and solve this. We have 410 and we're going to multiply it by 9, essentially adding 410 to itself 9 times.
Step 1: 0 + 410 = 410
Step 2: 410 + 410 = 820
Step 3: 820 + 410 = 1230
Step 4: 1230 + 410 = 1640
Step 5: 1640 + 410 = 2050
Step 6: 2050 + 410 = 2460
Step 7: 2460 + 410 = 2870
Step 8: 2870 + 410 = 3280
Step 9: 3280 + 410 = 3690

So, 410*9 = 3690