Sure thing, let's get straight to it. We start with 834 and we're going to multiply it by 40, which means adding 834 to itself 40 times.
Step 1: 0 + 834 = 834
Step 2: 834 + 834 = 1668
Step 3: 1668 + 834 = 2502
Step 4: 2502 + 834 = 3336
Step 5: 3336 + 834 = 4170
Step 6: 4170 + 834 = 5004
Step 7: 5004 + 834 = 5838
Step 8: 5838 + 834 = 6672
Step 9: 6672 + 834 = 7506
Step 10: 7506 + 834 = 8340
Step 11: 8340 + 834 = 9174
Step 12: 9174 + 834 = 10008
Step 13: 10008 + 834 = 10842
Step 14: 10842 + 834 = 11676
Step 15: 11676 + 834 = 12510
Step 16: 12510 + 834 = 13344
Step 17: 13344 + 834 = 14178
Step 18: 14178 + 834 = 15012
Step 19: 15012 + 834 = 15846
Step 20: 15846 + 834 = 16680
Step 21: 16680 + 834 = 17514
Step 22: 17514 + 834 = 18348
Step 23: 18348 + 834 = 19182
Step 24: 19182 + 834 = 20016
Step 25: 20016 + 834 = 20850
Step 26: 20850 + 834 = 21684
Step 27: 21684 + 834 = 22518
Step 28: 22518 + 834 = 23352
Step 29: 23352 + 834 = 24186
Step 30: 24186 + 834 = 25020
Step 31: 25020 + 834 = 25854
Step 32: 25854 + 834 = 26688
Step 33: 26688 + 834 = 27522
Step 34: 27522 + 834 = 28356
Step 35: 28356 + 834 = 29190
Step 36: 29190 + 834 = 30024
Step 37: 30024 + 834 = 30858
Step 38: 30858 + 834 = 31692
Step 39: 31692 + 834 = 32526
Step 40: 32526 + 834 = 33360

So, 834*40 = 33360