Alright, let's solve this math problem step by step. First, we have the number 9. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 45. So, we're going to take the number 9 and add it to itself 45 times.
Step 1: 0 + 9 = 9
Step 2: 9 + 9 = 18
Step 3: 18 + 9 = 27
Step 4: 27 + 9 = 36
Step 5: 36 + 9 = 45
Step 6: 45 + 9 = 54
Step 7: 54 + 9 = 63
Step 8: 63 + 9 = 72
Step 9: 72 + 9 = 81
Step 10: 81 + 9 = 90
Step 11: 90 + 9 = 99
Step 12: 99 + 9 = 108
Step 13: 108 + 9 = 117
Step 14: 117 + 9 = 126
Step 15: 126 + 9 = 135
Step 16: 135 + 9 = 144
Step 17: 144 + 9 = 153
Step 18: 153 + 9 = 162
Step 19: 162 + 9 = 171
Step 20: 171 + 9 = 180
Step 21: 180 + 9 = 189
Step 22: 189 + 9 = 198
Step 23: 198 + 9 = 207
Step 24: 207 + 9 = 216
Step 25: 216 + 9 = 225
Step 26: 225 + 9 = 234
Step 27: 234 + 9 = 243
Step 28: 243 + 9 = 252
Step 29: 252 + 9 = 261
Step 30: 261 + 9 = 270
Step 31: 270 + 9 = 279
Step 32: 279 + 9 = 288
Step 33: 288 + 9 = 297
Step 34: 297 + 9 = 306
Step 35: 306 + 9 = 315
Step 36: 315 + 9 = 324
Step 37: 324 + 9 = 333
Step 38: 333 + 9 = 342
Step 39: 342 + 9 = 351
Step 40: 351 + 9 = 360
Step 41: 360 + 9 = 369
Step 42: 369 + 9 = 378
Step 43: 378 + 9 = 387
Step 44: 387 + 9 = 396
Step 45: 396 + 9 = 405

So, 9*45 = 405