Tim hires two bodyguards.  They each charge $20 an hour.  He hires them for 8 hour per day.  How much does he pay them in a week if he hires them 7 days a week?
It cost him 20*2=$
<gadget id="calculator">20*2</gadget>
<output>40</output>
40 an hour for both of them.
That means he pays 40*8=$
<gadget id="calculator">40*8</gadget>
<output>320</output>
320 a day.
So he pays 320*7=$
<gadget id="calculator">320*7</gadget>
<output>2_240</output>
2240 a week.

<result>2_240</result>