OK, let's crack this. We're given 131 and our task is to multiply it by 7. Essentially, we'll be adding 131 to itself 7 times.
Step 1: 0 + 131 = 131
Step 2: 131 + 131 = 262
Step 3: 262 + 131 = 393
Step 4: 393 + 131 = 524
Step 5: 524 + 131 = 655
Step 6: 655 + 131 = 786
Step 7: 786 + 131 = 917

So, 131*7 = 917