Alright, let's solve this math problem step by step. First, we have the number 45. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 22. So, we're going to take the number 45 and add it to itself 22 times.
Step 1: 0 + 45 = 45
Step 2: 45 + 45 = 90
Step 3: 90 + 45 = 135
Step 4: 135 + 45 = 180
Step 5: 180 + 45 = 225
Step 6: 225 + 45 = 270
Step 7: 270 + 45 = 315
Step 8: 315 + 45 = 360
Step 9: 360 + 45 = 405
Step 10: 405 + 45 = 450
Step 11: 450 + 45 = 495
Step 12: 495 + 45 = 540
Step 13: 540 + 45 = 585
Step 14: 585 + 45 = 630
Step 15: 630 + 45 = 675
Step 16: 675 + 45 = 720
Step 17: 720 + 45 = 765
Step 18: 765 + 45 = 810
Step 19: 810 + 45 = 855
Step 20: 855 + 45 = 900
Step 21: 900 + 45 = 945
Step 22: 945 + 45 = 990

So, 45*22 = 990