I figured it out:
Step 1: 0931 divided by 7 is equal to 133
Step 2: 133 upside down looks like the word "EEL"
Step 3: An eel is like a snake
Step 4: There was a snake in Woody's boot
Step 5: Woody is a toy, just like Legos
0931=931
931/6=155
155 backwards is 551
551-5=546
546 in numerical order is 456
456-56-6 = 344
take the first number and put 13 in the front
that number is now 133
133-10=123
elmo lives on 123 sesame street
sesame street is a show
ads appear in shows
ads are made by companys for other companys
lego is a company
therefore, the answer is lego