Let's roll up our sleeves and solve this. We have 980 and we're going to multiply it by 45, essentially adding 980 to itself 45 times.
Step 1: 0 + 980 = 980
Step 2: 980 + 980 = 1960
Step 3: 1960 + 980 = 2940
Step 4: 2940 + 980 = 3920
Step 5: 3920 + 980 = 4900
Step 6: 4900 + 980 = 5880
Step 7: 5880 + 980 = 6860
Step 8: 6860 + 980 = 7840
Step 9: 7840 + 980 = 8820
Step 10: 8820 + 980 = 9800
Step 11: 9800 + 980 = 10780
Step 12: 10780 + 980 = 11760
Step 13: 11760 + 980 = 12740
Step 14: 12740 + 980 = 13720
Step 15: 13720 + 980 = 14700
Step 16: 14700 + 980 = 15680
Step 17: 15680 + 980 = 16660
Step 18: 16660 + 980 = 17640
Step 19: 17640 + 980 = 18620
Step 20: 18620 + 980 = 19600
Step 21: 19600 + 980 = 20580
Step 22: 20580 + 980 = 21560
Step 23: 21560 + 980 = 22540
Step 24: 22540 + 980 = 23520
Step 25: 23520 + 980 = 24500
Step 26: 24500 + 980 = 25480
Step 27: 25480 + 980 = 26460
Step 28: 26460 + 980 = 27440
Step 29: 27440 + 980 = 28420
Step 30: 28420 + 980 = 29400
Step 31: 29400 + 980 = 30380
Step 32: 30380 + 980 = 31360
Step 33: 31360 + 980 = 32340
Step 34: 32340 + 980 = 33320
Step 35: 33320 + 980 = 34300
Step 36: 34300 + 980 = 35280
Step 37: 35280 + 980 = 36260
Step 38: 36260 + 980 = 37240
Step 39: 37240 + 980 = 38220
Step 40: 38220 + 980 = 39200
Step 41: 39200 + 980 = 40180
Step 42: 40180 + 980 = 41160
Step 43: 41160 + 980 = 42140
Step 44: 42140 + 980 = 43120
Step 45: 43120 + 980 = 44100

So, 980*45 = 44100