Let's get this math done. We have 664 and we're going to multiply it by 97. This is the same as taking 664 and adding it to itself 97 times.
Step 1: 0 + 664 = 664
Step 2: 664 + 664 = 1328
Step 3: 1328 + 664 = 1992
Step 4: 1992 + 664 = 2656
Step 5: 2656 + 664 = 3320
Step 6: 3320 + 664 = 3984
Step 7: 3984 + 664 = 4648
Step 8: 4648 + 664 = 5312
Step 9: 5312 + 664 = 5976
Step 10: 5976 + 664 = 6640
Step 11: 6640 + 664 = 7304
Step 12: 7304 + 664 = 7968
Step 13: 7968 + 664 = 8632
Step 14: 8632 + 664 = 9296
Step 15: 9296 + 664 = 9960
Step 16: 9960 + 664 = 10624
Step 17: 10624 + 664 = 11288
Step 18: 11288 + 664 = 11952
Step 19: 11952 + 664 = 12616
Step 20: 12616 + 664 = 13280
Step 21: 13280 + 664 = 13944
Step 22: 13944 + 664 = 14608
Step 23: 14608 + 664 = 15272
Step 24: 15272 + 664 = 15936
Step 25: 15936 + 664 = 16600
Step 26: 16600 + 664 = 17264
Step 27: 17264 + 664 = 17928
Step 28: 17928 + 664 = 18592
Step 29: 18592 + 664 = 19256
Step 30: 19256 + 664 = 19920
Step 31: 19920 + 664 = 20584
Step 32: 20584 + 664 = 21248
Step 33: 21248 + 664 = 21912
Step 34: 21912 + 664 = 22576
Step 35: 22576 + 664 = 23240
Step 36: 23240 + 664 = 23904
Step 37: 23904 + 664 = 24568
Step 38: 24568 + 664 = 25232
Step 39: 25232 + 664 = 25896
Step 40: 25896 + 664 = 26560
Step 41: 26560 + 664 = 27224
Step 42: 27224 + 664 = 27888
Step 43: 27888 + 664 = 28552
Step 44: 28552 + 664 = 29216
Step 45: 29216 + 664 = 29880
Step 46: 29880 + 664 = 30544
Step 47: 30544 + 664 = 31208
Step 48: 31208 + 664 = 31872
Step 49: 31872 + 664 = 32536
Step 50: 32536 + 664 = 33200
Step 51: 33200 + 664 = 33864
Step 52: 33864 + 664 = 34528
Step 53: 34528 + 664 = 35192
Step 54: 35192 + 664 = 35856
Step 55: 35856 + 664 = 36520
Step 56: 36520 + 664 = 37184
Step 57: 37184 + 664 = 37848
Step 58: 37848 + 664 = 38512
Step 59: 38512 + 664 = 39176
Step 60: 39176 + 664 = 39840
Step 61: 39840 + 664 = 40504
Step 62: 40504 + 664 = 41168
Step 63: 41168 + 664 = 41832
Step 64: 41832 + 664 = 42496
Step 65: 42496 + 664 = 43160
Step 66: 43160 + 664 = 43824
Step 67: 43824 + 664 = 44488
Step 68: 44488 + 664 = 45152
Step 69: 45152 + 664 = 45816
Step 70: 45816 + 664 = 46480
Step 71: 46480 + 664 = 47144
Step 72: 47144 + 664 = 47808
Step 73: 47808 + 664 = 48472
Step 74: 48472 + 664 = 49136
Step 75: 49136 + 664 = 49800
Step 76: 49800 + 664 = 50464
Step 77: 50464 + 664 = 51128
Step 78: 51128 + 664 = 51792
Step 79: 51792 + 664 = 52456
Step 80: 52456 + 664 = 53120
Step 81: 53120 + 664 = 53784
Step 82: 53784 + 664 = 54448
Step 83: 54448 + 664 = 55112
Step 84: 55112 + 664 = 55776
Step 85: 55776 + 664 = 56440
Step 86: 56440 + 664 = 57104
Step 87: 57104 + 664 = 57768
Step 88: 57768 + 664 = 58432
Step 89: 58432 + 664 = 59096
Step 90: 59096 + 664 = 59760
Step 91: 59760 + 664 = 60424
Step 92: 60424 + 664 = 61088
Step 93: 61088 + 664 = 61752
Step 94: 61752 + 664 = 62416
Step 95: 62416 + 664 = 63080
Step 96: 63080 + 664 = 63744
Step 97: 63744 + 664 = 64408

So, 664*97 = 64408