John's car gets 30 mpg.  He drives 20 miles to work each way 5 days a week.  He also drives another 40 miles a week for leisure travel. How many gallons of gas does he use a week?
He drives 20*2=
<gadget id="calculator">20*2</gadget>
<output>40</output>
40 miles per day for work.
So he drives 40*5=
<gadget id="calculator">40*5</gadget>
<output>200</output>
200 miles for work.
So he drives a total of 200+40=
<gadget id="calculator">200+40</gadget>
<output>240</output>
240 miles per week.
That means he uses 240/30=
<gadget id="calculator">240/30</gadget>
<output>8</output>
8 gallons of gas a week.

<result>8</result>