Thanks to @olivercat for alerting me to Uncle Ben's other wok promotion:

Purchase entry:
Need 3 UPCs obtained from selected (rules indicate which products) purchases within date ranges indicated on contest site.
ORIGINAL RECEIPTS MAY BE REQUIRED TO VALIDATE OFFER. KEEP RECEIPTS IN A SAFE PLACE. Failure to provide such proof in a timely manner may result in disqualification. The sole determinant of the time for the purposes of a valid entry in this Promotion will be the Promotion server machine(s).

Non-purchase entry (daily entry allowed):
iii) No Purchase Entry: To enter without the purchase of any Participating Products, on a white piece of paper, write a hand-written 150 word essay on why you would like to try and use UNCLE BEN’S® rice products for your Stir Fry dinner. At the end of your essay you must also state, “My answer to the skill-testing question is” and insert your response to the following mathematical skill-testing question:
  • Multiply10x10
  • Add25
  • Divide by10
  • Subtract10

Your answer to this skill-testing question must be correct and have been completed unaided in order for your entry to be valid. Mail the envelope containing your hand-written essay and response to the mathematical skill-testing question to UNCLE BEN’S® Stir Fry Contest Promo, c/o 5225 Satellite Dr. Mississauga, ON., L4W 5P9. RE: No Purchase entry to receive an entry into the UNCLE BEN’S® Stir Fry Promotion. Requests must be postmarked on or before March 2nd, 2020 and received prior to March 3rd, 2020 11:00:00 AM (ET). Limit one (1) unique essay / entry request per outer mailing envelope per day while supplies last. Requests that are made in any fashion other than as specified herein are void.
The prizes:
4. PRIZES & ODDS OF WINNING: There are a total of eight hundred (800) Grand Prizes, available to be won at the start of the Promotion. A total of one hundred (100) Grand Prizes will be available to be won each week of the Promotion Period in the Weekly Sweepstakes.
  • Each Grand Prize consists of one (1) wok with an UNCLE BEN’S® engraved logo on the handle. (Approximate retail value $33.99CAD)

A random draw will be conducted for each Weekly Sweepstakes on the proceeding Tuesday after the Weekly Sweepstakes end date in Toronto, Ontario at approximately 11:00:00 AM (ET), starting on Tuesday January 14th, 2020 with the final draw on Tuesday March 3rd, 2020, to select the potential winners of the Grand Prize from among all eligible entries received during the Weekly Sweepstakes period. Overall Odds of Winning depend on the number of valid entries received in each Weekly Sweepstakes period. Grand Prizes will diminish as they are won and claimed.
In no event will the Sponsor be liable for more than the eight hundred (800) Grand Prizes as disclosed in these Official Rules.