Answer:
42,504
Explanation:
Well, being a rudimentary rule of math, I'm going to work this out in a mental math manner for you to help you understand how it works.
Step 1 - Write it out laterally
1288
x 33
Step 2 - Multiply 3 across; make sure to carry
1288
x 33
3864
Step 3 - Add a zero to the end on the next line then repeat with the next 3 which is in the 10s place preparing it into an addition problem
1288
x 33
3864
+ 38640
Step 4 - Add them together
1288
x 33
3864
+ 38640
42504
Hope this helps