OK, let's work through this together. We're starting with 710 and we're going to multiply it by 10, which means we add 710 to itself 10 times.
Step 1: 0 + 710 = 710
Step 2: 710 + 710 = 1420
Step 3: 1420 + 710 = 2130
Step 4: 2130 + 710 = 2840
Step 5: 2840 + 710 = 3550
Step 6: 3550 + 710 = 4260
Step 7: 4260 + 710 = 4970
Step 8: 4970 + 710 = 5680
Step 9: 5680 + 710 = 6390
Step 10: 6390 + 710 = 7100

So, 710*10 = 7100