OK, let's work through this together. We're starting with 656 and we're going to multiply it by 40, which means we add 656 to itself 40 times.
Step 1: 0 + 656 = 656
Step 2: 656 + 656 = 1312
Step 3: 1312 + 656 = 1968
Step 4: 1968 + 656 = 2624
Step 5: 2624 + 656 = 3280
Step 6: 3280 + 656 = 3936
Step 7: 3936 + 656 = 4592
Step 8: 4592 + 656 = 5248
Step 9: 5248 + 656 = 5904
Step 10: 5904 + 656 = 6560
Step 11: 6560 + 656 = 7216
Step 12: 7216 + 656 = 7872
Step 13: 7872 + 656 = 8528
Step 14: 8528 + 656 = 9184
Step 15: 9184 + 656 = 9840
Step 16: 9840 + 656 = 10496
Step 17: 10496 + 656 = 11152
Step 18: 11152 + 656 = 11808
Step 19: 11808 + 656 = 12464
Step 20: 12464 + 656 = 13120
Step 21: 13120 + 656 = 13776
Step 22: 13776 + 656 = 14432
Step 23: 14432 + 656 = 15088
Step 24: 15088 + 656 = 15744
Step 25: 15744 + 656 = 16400
Step 26: 16400 + 656 = 17056
Step 27: 17056 + 656 = 17712
Step 28: 17712 + 656 = 18368
Step 29: 18368 + 656 = 19024
Step 30: 19024 + 656 = 19680
Step 31: 19680 + 656 = 20336
Step 32: 20336 + 656 = 20992
Step 33: 20992 + 656 = 21648
Step 34: 21648 + 656 = 22304
Step 35: 22304 + 656 = 22960
Step 36: 22960 + 656 = 23616
Step 37: 23616 + 656 = 24272
Step 38: 24272 + 656 = 24928
Step 39: 24928 + 656 = 25584
Step 40: 25584 + 656 = 26240

So, 656*40 = 26240