OK, let's work through this together. We're starting with 158 and we're going to multiply it by 16, which means we add 158 to itself 16 times.
Step 1: 0 + 158 = 158
Step 2: 158 + 158 = 316
Step 3: 316 + 158 = 474
Step 4: 474 + 158 = 632
Step 5: 632 + 158 = 790
Step 6: 790 + 158 = 948
Step 7: 948 + 158 = 1106
Step 8: 1106 + 158 = 1264
Step 9: 1264 + 158 = 1422
Step 10: 1422 + 158 = 1580
Step 11: 1580 + 158 = 1738
Step 12: 1738 + 158 = 1896
Step 13: 1896 + 158 = 2054
Step 14: 2054 + 158 = 2212
Step 15: 2212 + 158 = 2370
Step 16: 2370 + 158 = 2528

So, 158*16 = 2528