Without delay, let's solve this. We've got 40 and we will be multiplying it by 24, that is, adding 40 to itself 24 times.
Step 1: 0 + 40 = 40
Step 2: 40 + 40 = 80
Step 3: 80 + 40 = 120
Step 4: 120 + 40 = 160
Step 5: 160 + 40 = 200
Step 6: 200 + 40 = 240
Step 7: 240 + 40 = 280
Step 8: 280 + 40 = 320
Step 9: 320 + 40 = 360
Step 10: 360 + 40 = 400
Step 11: 400 + 40 = 440
Step 12: 440 + 40 = 480
Step 13: 480 + 40 = 520
Step 14: 520 + 40 = 560
Step 15: 560 + 40 = 600
Step 16: 600 + 40 = 640
Step 17: 640 + 40 = 680
Step 18: 680 + 40 = 720
Step 19: 720 + 40 = 760
Step 20: 760 + 40 = 800
Step 21: 800 + 40 = 840
Step 22: 840 + 40 = 880
Step 23: 880 + 40 = 920
Step 24: 920 + 40 = 960

So, 40*24 = 960