Let's get this math done. We have 287 and we're going to multiply it by 7. This is the same as taking 287 and adding it to itself 7 times.
Step 1: 0 + 287 = 287
Step 2: 287 + 287 = 574
Step 3: 574 + 287 = 861
Step 4: 861 + 287 = 1148
Step 5: 1148 + 287 = 1435
Step 6: 1435 + 287 = 1722
Step 7: 1722 + 287 = 2009

So, 287*7 = 2009