LaKeisha is mowing lawns to raise money for a collector set of books. She charges $.10 for every square foot of lawn. The book set costs $150. If she has already mowed three 20 x 15 foot lawns, how many more square feet does she have to mow to earn enough for the book set?
She has mowed 900 square feet because 3 x 20 x 15 = <<3*20*15=900>>900
She has earned $90 because 900 x .1 = <<900*.1=90>>90
She has to earn $60 more dollars because 150 - 90 = <<150-90=60>>60
She has to mow 600 more square feet of lawns because 60 / .1 = <<60/.1=600>>600
#### 600
Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
You are solving math problems. Here are some examples of how to solve the task:

There are six oranges in a fruit basket. There are two fewer apples than oranges.  There are 3 times as many bananas as apples, and there are half as many peaches as bananas.  How many pieces of fruit are in the fruit basket?There are 6 - 2 = <<6-2=4>>4 apples.
There are 3 * 4 = <<3*4=12>>12 bananas.
There is 1/2 x 12 bananas = <<1/2*12=6>>6 peaches.
There is 6 oranges + 4 apples + 12 bananas + 6 peaches = <<6+4+12+6=28>>28 pieces of fruit.
#### 28[END]

Patricia and Geoffrey went fishing to feed their group of campers. They caught an eight-pound trout, six two-pound bass, and two twelve-pound salmon. If each person will eat two pounds of fish, how many campers can they feed?The bass weigh 6 * 2 = <<6*2=12>>12 pounds in all.
The salmon weigh 2 * 12 = <<2*12=24>>24 pounds in all.
The trout, bass, and salmon together weigh 8 + 12 + 24 = <<8+12+24=44>>44 pounds.
Each camper will eat 2 pounds of fish, so Patricia and Jeffrey can feed 44 / 2 = <<44/2=22>>22 campers.
#### 22[END]

Now, solve this next question in the style of the above examples:

LaKeisha is mowing lawns to raise money for a collector set of books. She charges $.10 for every square foot of lawn. The book set costs $150. If she has already mowed three 20 x 15 foot lawns, how many more square feet does she have to mow to earn enough for the book set?

### Response:
She has mowed 900 square feet because 3 x 20 x 15 = <<3*20*15=900>>900
She has earned $90 because 900 x .1 = <<900*.1=90>>90
She has to earn $60 more dollars because 150 - 90 = <<150-90=60>>60
She has to mow 600 more square feet of lawns because 60 / .1 = <<60/.1=600>>600
#### 600