OK, let's crack this. We're given 890 and our task is to multiply it by 7. Essentially, we'll be adding 890 to itself 7 times.
Step 1: 0 + 890 = 890
Step 2: 890 + 890 = 1780
Step 3: 1780 + 890 = 2670
Step 4: 2670 + 890 = 3560
Step 5: 3560 + 890 = 4450
Step 6: 4450 + 890 = 5340
Step 7: 5340 + 890 = 6230

So, 890*7 = 6230