1000 milligrams = 1 gram
Lethal Dose:
10 grams = 10,000 milligrams
Step 1:
Lethal dose divided by mg per can.
10,000 mg / 1.71 mg= 5847.95 ounces
Step 2:
5847.95 oz / 12 oz per can= 487.32 cans
Step 3:
Round up to 488 cans because we have to buy whole cans.
Hope this helps! :)