Let's get this math done. We have 187 and we're going to multiply it by 7. This is the same as taking 187 and adding it to itself 7 times.
Step 1: 0 + 187 = 187
Step 2: 187 + 187 = 374
Step 3: 374 + 187 = 561
Step 4: 561 + 187 = 748
Step 5: 748 + 187 = 935
Step 6: 935 + 187 = 1122
Step 7: 1122 + 187 = 1309

So, 187*7 = 1309