For every sandwich that he eats, Sam eats four apples. If he eats 10 sandwiches every day for one week, how many apples does he eat?
Ten sandwiches every day for one week is 7*10 = <<7*10=70>>70 sandwiches.
For every sandwich that Sam eats, he eats four apples, and since he ate 70 sandwiches, he ate 70*4 =<<70*4=280>>280 apples.
#### 280