Let's get this math done. We have 801 and we're going to multiply it by 19. This is the same as taking 801 and adding it to itself 19 times.
Step 1: 0 + 801 = 801
Step 2: 801 + 801 = 1602
Step 3: 1602 + 801 = 2403
Step 4: 2403 + 801 = 3204
Step 5: 3204 + 801 = 4005
Step 6: 4005 + 801 = 4806
Step 7: 4806 + 801 = 5607
Step 8: 5607 + 801 = 6408
Step 9: 6408 + 801 = 7209
Step 10: 7209 + 801 = 8010
Step 11: 8010 + 801 = 8811
Step 12: 8811 + 801 = 9612
Step 13: 9612 + 801 = 10413
Step 14: 10413 + 801 = 11214
Step 15: 11214 + 801 = 12015
Step 16: 12015 + 801 = 12816
Step 17: 12816 + 801 = 13617
Step 18: 13617 + 801 = 14418
Step 19: 14418 + 801 = 15219

So, 801*19 = 15219