Without delay, let's solve this. We've got 896 and we will be multiplying it by 20, that is, adding 896 to itself 20 times.
Step 1: 0 + 896 = 896
Step 2: 896 + 896 = 1792
Step 3: 1792 + 896 = 2688
Step 4: 2688 + 896 = 3584
Step 5: 3584 + 896 = 4480
Step 6: 4480 + 896 = 5376
Step 7: 5376 + 896 = 6272
Step 8: 6272 + 896 = 7168
Step 9: 7168 + 896 = 8064
Step 10: 8064 + 896 = 8960
Step 11: 8960 + 896 = 9856
Step 12: 9856 + 896 = 10752
Step 13: 10752 + 896 = 11648
Step 14: 11648 + 896 = 12544
Step 15: 12544 + 896 = 13440
Step 16: 13440 + 896 = 14336
Step 17: 14336 + 896 = 15232
Step 18: 15232 + 896 = 16128
Step 19: 16128 + 896 = 17024
Step 20: 17024 + 896 = 17920

So, 896*20 = 17920