OK, let's crack this. We're given 431 and our task is to multiply it by 7. Essentially, we'll be adding 431 to itself 7 times.
Step 1: 0 + 431 = 431
Step 2: 431 + 431 = 862
Step 3: 862 + 431 = 1293
Step 4: 1293 + 431 = 1724
Step 5: 1724 + 431 = 2155
Step 6: 2155 + 431 = 2586
Step 7: 2586 + 431 = 3017

So, 431*7 = 3017