OK, let's work through this together. We're starting with 438 and we're going to multiply it by 23, which means we add 438 to itself 23 times.
Step 1: 0 + 438 = 438
Step 2: 438 + 438 = 876
Step 3: 876 + 438 = 1314
Step 4: 1314 + 438 = 1752
Step 5: 1752 + 438 = 2190
Step 6: 2190 + 438 = 2628
Step 7: 2628 + 438 = 3066
Step 8: 3066 + 438 = 3504
Step 9: 3504 + 438 = 3942
Step 10: 3942 + 438 = 4380
Step 11: 4380 + 438 = 4818
Step 12: 4818 + 438 = 5256
Step 13: 5256 + 438 = 5694
Step 14: 5694 + 438 = 6132
Step 15: 6132 + 438 = 6570
Step 16: 6570 + 438 = 7008
Step 17: 7008 + 438 = 7446
Step 18: 7446 + 438 = 7884
Step 19: 7884 + 438 = 8322
Step 20: 8322 + 438 = 8760
Step 21: 8760 + 438 = 9198
Step 22: 9198 + 438 = 9636
Step 23: 9636 + 438 = 10074

So, 438*23 = 10074