OK, let's crack this. We're given 948 and our task is to multiply it by 40. Essentially, we'll be adding 948 to itself 40 times.
Step 1: 0 + 948 = 948
Step 2: 948 + 948 = 1896
Step 3: 1896 + 948 = 2844
Step 4: 2844 + 948 = 3792
Step 5: 3792 + 948 = 4740
Step 6: 4740 + 948 = 5688
Step 7: 5688 + 948 = 6636
Step 8: 6636 + 948 = 7584
Step 9: 7584 + 948 = 8532
Step 10: 8532 + 948 = 9480
Step 11: 9480 + 948 = 10428
Step 12: 10428 + 948 = 11376
Step 13: 11376 + 948 = 12324
Step 14: 12324 + 948 = 13272
Step 15: 13272 + 948 = 14220
Step 16: 14220 + 948 = 15168
Step 17: 15168 + 948 = 16116
Step 18: 16116 + 948 = 17064
Step 19: 17064 + 948 = 18012
Step 20: 18012 + 948 = 18960
Step 21: 18960 + 948 = 19908
Step 22: 19908 + 948 = 20856
Step 23: 20856 + 948 = 21804
Step 24: 21804 + 948 = 22752
Step 25: 22752 + 948 = 23700
Step 26: 23700 + 948 = 24648
Step 27: 24648 + 948 = 25596
Step 28: 25596 + 948 = 26544
Step 29: 26544 + 948 = 27492
Step 30: 27492 + 948 = 28440
Step 31: 28440 + 948 = 29388
Step 32: 29388 + 948 = 30336
Step 33: 30336 + 948 = 31284
Step 34: 31284 + 948 = 32232
Step 35: 32232 + 948 = 33180
Step 36: 33180 + 948 = 34128
Step 37: 34128 + 948 = 35076
Step 38: 35076 + 948 = 36024
Step 39: 36024 + 948 = 36972
Step 40: 36972 + 948 = 37920

So, 948*40 = 37920