OK, let's work through this together. We're starting with 246 and we're going to multiply it by 10, which means we add 246 to itself 10 times.
Step 1: 0 + 246 = 246
Step 2: 246 + 246 = 492
Step 3: 492 + 246 = 738
Step 4: 738 + 246 = 984
Step 5: 984 + 246 = 1230
Step 6: 1230 + 246 = 1476
Step 7: 1476 + 246 = 1722
Step 8: 1722 + 246 = 1968
Step 9: 1968 + 246 = 2214
Step 10: 2214 + 246 = 2460

So, 246*10 = 2460