James has 28 marbles.  He puts them into 4 bags.  He puts the same number in each bag.  He then gives one bag away.  How many marbles does James have left? Let's think step by step and output the final answer after "####".
user
James has 28 marbles / 4 bags = <<28/4=7>>7 marbles per bag.
James has 28 marbles - 7 marbles = <<28-7=21>>21 marbles remaining.
#### 21
James has 28 marbles.  He puts them into 4 bags.  He puts the same number in each bag.  He then gives one bag away.  How many marbles does James have left?
train