Wanda walks her daughter .5 miles to school in the morning and then walks .5 miles home.  She repeats this when she meets her daughter after school in the afternoon.  They walk to school 5 days a week.  How many miles does Wanda walk after 4 weeks?
She walks .5 miles to school and back 4 times a day so that's .5*4 = <<.5*4=2>>2 miles
She walks 2 miles a day for 5 days so that's 2*5 = <<2*5=10>>10 miles
Over 4 weeks of walking 10 miles per week she walks 4*10 = <<4*10=40>>40 miles
#### 40