OK, let's work through this together. We're starting with 758 and we're going to multiply it by 10, which means we add 758 to itself 10 times.
Step 1: 0 + 758 = 758
Step 2: 758 + 758 = 1516
Step 3: 1516 + 758 = 2274
Step 4: 2274 + 758 = 3032
Step 5: 3032 + 758 = 3790
Step 6: 3790 + 758 = 4548
Step 7: 4548 + 758 = 5306
Step 8: 5306 + 758 = 6064
Step 9: 6064 + 758 = 6822
Step 10: 6822 + 758 = 7580

So, 758*10 = 7580