OK, let's work through this together. We're starting with 375 and we're going to multiply it by 30, which means we add 375 to itself 30 times.
Step 1: 0 + 375 = 375
Step 2: 375 + 375 = 750
Step 3: 750 + 375 = 1125
Step 4: 1125 + 375 = 1500
Step 5: 1500 + 375 = 1875
Step 6: 1875 + 375 = 2250
Step 7: 2250 + 375 = 2625
Step 8: 2625 + 375 = 3000
Step 9: 3000 + 375 = 3375
Step 10: 3375 + 375 = 3750
Step 11: 3750 + 375 = 4125
Step 12: 4125 + 375 = 4500
Step 13: 4500 + 375 = 4875
Step 14: 4875 + 375 = 5250
Step 15: 5250 + 375 = 5625
Step 16: 5625 + 375 = 6000
Step 17: 6000 + 375 = 6375
Step 18: 6375 + 375 = 6750
Step 19: 6750 + 375 = 7125
Step 20: 7125 + 375 = 7500
Step 21: 7500 + 375 = 7875
Step 22: 7875 + 375 = 8250
Step 23: 8250 + 375 = 8625
Step 24: 8625 + 375 = 9000
Step 25: 9000 + 375 = 9375
Step 26: 9375 + 375 = 9750
Step 27: 9750 + 375 = 10125
Step 28: 10125 + 375 = 10500
Step 29: 10500 + 375 = 10875
Step 30: 10875 + 375 = 11250

So, 375*30 = 11250