OK, let's work through this together. We're starting with 238 and we're going to multiply it by 7, which means we add 238 to itself 7 times.
Step 1: 0 + 238 = 238
Step 2: 238 + 238 = 476
Step 3: 476 + 238 = 714
Step 4: 714 + 238 = 952
Step 5: 952 + 238 = 1190
Step 6: 1190 + 238 = 1428
Step 7: 1428 + 238 = 1666

So, 238*7 = 1666