Alright, let's solve this math problem step by step. First, we have the number 168. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 31. So, we're going to take the number 168 and add it to itself 31 times.
Step 1: 0 + 168 = 168
Step 2: 168 + 168 = 336
Step 3: 336 + 168 = 504
Step 4: 504 + 168 = 672
Step 5: 672 + 168 = 840
Step 6: 840 + 168 = 1008
Step 7: 1008 + 168 = 1176
Step 8: 1176 + 168 = 1344
Step 9: 1344 + 168 = 1512
Step 10: 1512 + 168 = 1680
Step 11: 1680 + 168 = 1848
Step 12: 1848 + 168 = 2016
Step 13: 2016 + 168 = 2184
Step 14: 2184 + 168 = 2352
Step 15: 2352 + 168 = 2520
Step 16: 2520 + 168 = 2688
Step 17: 2688 + 168 = 2856
Step 18: 2856 + 168 = 3024
Step 19: 3024 + 168 = 3192
Step 20: 3192 + 168 = 3360
Step 21: 3360 + 168 = 3528
Step 22: 3528 + 168 = 3696
Step 23: 3696 + 168 = 3864
Step 24: 3864 + 168 = 4032
Step 25: 4032 + 168 = 4200
Step 26: 4200 + 168 = 4368
Step 27: 4368 + 168 = 4536
Step 28: 4536 + 168 = 4704
Step 29: 4704 + 168 = 4872
Step 30: 4872 + 168 = 5040
Step 31: 5040 + 168 = 5208

So, 168*31 = 5208