Olivia gave William 10 napkins. Amelia also gives William twice the number of napkins Olivia gave him. If William had 15 napkins before, how many napkins does he have now?
After Olivia gave William 10 napkins, he ends up with 15+10= <<10+15=25>>25 napkins.
Amelia gives William twice the number of napkins given to him by Amelia which is 2*10 = <<2*10=20>>20 napkins.
The total number of napkins William has now is 20+25 = <<20+25=45>>45 napkins.
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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:

Alex has some new shirts. Joe has 3 more new shirts than Alex. Ben has eight more new shirts than Joe. If Ben has 15 new shirts, how many new shirts does Alex have?Joe has 15-8=<<15-8=7>>7 new shirts.
Alex has 7-3=<<7-3=4>>4 new shirts.
#### 4[END]

A cattle breeder owns 52 dairy cows. Each cow gives 1000 oz of milk per day. Calculate the amount of milk produced per week by the cows.Per day, the amount of milk produced is 1000*52 = <<1000*52=52000>>52000 oz.
Per week, the amount of milk produced is 52000*7 = <<52000*7=364000>>364000 oz.
#### 364000[END]

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

Olivia gave William 10 napkins. Amelia also gives William twice the number of napkins Olivia gave him. If William had 15 napkins before, how many napkins does he have now?

### Response:
After Olivia gave William 10 napkins, he ends up with 15+10= <<10+15=25>>25 napkins.
Amelia gives William twice the number of napkins given to him by Amelia which is 2*10 = <<2*10=20>>20 napkins.
The total number of napkins William has now is 20+25 = <<20+25=45>>45 napkins.
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