Let's get this math done. We have 148 and we're going to multiply it by 15. This is the same as taking 148 and adding it to itself 15 times.
Step 1: 0 + 148 = 148
Step 2: 148 + 148 = 296
Step 3: 296 + 148 = 444
Step 4: 444 + 148 = 592
Step 5: 592 + 148 = 740
Step 6: 740 + 148 = 888
Step 7: 888 + 148 = 1036
Step 8: 1036 + 148 = 1184
Step 9: 1184 + 148 = 1332
Step 10: 1332 + 148 = 1480
Step 11: 1480 + 148 = 1628
Step 12: 1628 + 148 = 1776
Step 13: 1776 + 148 = 1924
Step 14: 1924 + 148 = 2072
Step 15: 2072 + 148 = 2220

So, 148*15 = 2220