A supplier is packing cartons of canned juice. Each carton has 20 cans of juice. Out of the 50 cartons that have been packed, only 40 cartons have been loaded on a truck. How many cans of juice are left to be loaded on the truck?
There are 50 - 40 = <<50-40=10>>10 cartons of canned juice that are left to be loaded on the truck.
This is equal to 10 x 20 = <<10*20=200>>200 cans of juice.
#### 200