Helga works for a newspaper company. She can write 5 articles every 30 minutes, and she usually works 4 hours a day 5 days a week. If Helga worked an extra 2 hours last Thursday, and an extra 3 hours last Friday, how many articles was she able to write this week?
Helga writes 5 x 2 = 
<gadget id="calculator">5*2</gadget>
<output>10</output>
10 articles per hour.
And she can write 10 x 4 = 
<gadget id="calculator">10*4</gadget>
<output>40</output>
40 articles every 4 hours.
So, the total number of articles she usually writes for a week is 40 x 5 = 
<gadget id="calculator">40*5</gadget>
<output>200</output>
200 articles.
She was able to write 10 x 2 = 
<gadget id="calculator">10*2</gadget>
<output>20</output>
20 articles on her extra 2 hours last Thursday.
And she was able to write 10 x 3 = 
<gadget id="calculator">10*3</gadget>
<output>30</output>
30 articles on her extra hour last Friday.
So, the total number of articles she was able to write on her extra hours is 20 + 30= 
<gadget id="calculator">20+30</gadget>
<output>50</output>
50.
Therefore, she was able to write a total of 200 + 50 = 
<gadget id="calculator">200+50</gadget>
<output>250</output>
250 this week.

<result>250</result>