Alright, let's solve this math problem step by step. First, we have the number 17. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 20. So, we're going to take the number 17 and add it to itself 20 times.
Step 1: 0 + 17 = 17
Step 2: 17 + 17 = 34
Step 3: 34 + 17 = 51
Step 4: 51 + 17 = 68
Step 5: 68 + 17 = 85
Step 6: 85 + 17 = 102
Step 7: 102 + 17 = 119
Step 8: 119 + 17 = 136
Step 9: 136 + 17 = 153
Step 10: 153 + 17 = 170
Step 11: 170 + 17 = 187
Step 12: 187 + 17 = 204
Step 13: 204 + 17 = 221
Step 14: 221 + 17 = 238
Step 15: 238 + 17 = 255
Step 16: 255 + 17 = 272
Step 17: 272 + 17 = 289
Step 18: 289 + 17 = 306
Step 19: 306 + 17 = 323
Step 20: 323 + 17 = 340

So, 17*20 = 340