Mark is a lawyer who works at the county courthouse every day. It takes him 5 minutes to find parking and 3 minutes to walk into the courthouse. 2 days of the week it takes him 30 minutes to get through the metal detector and the other 3 days are less crowded so he gets through in 10 minutes. How long does he spend on all these activities in a week with 5 work days?
First find how long Mark spends on parking and walking each day: 5 minutes + 3 minutes = 
<gadget id="calculator">5+3</gadget>
<output>8</output>
8 minutes.
Then multiply that number by his number of workdays to find the total walking and parking time: 8 minutes/day * 5 days/week = 
<gadget id="calculator">8*5</gadget>
<output>40</output>
40 minutes/week.
Then multiply the number of long-wait days by the time of each long wait: 2 days/week * 30 minutes/day = 
<gadget id="calculator">2*30</gadget>
<output>60</output>
60 minutes/week.
Then multiply the number of short-wait days by the time of each short wait: 3 days/week * 10 minutes/day = 
<gadget id="calculator">3*10</gadget>
<output>30</output>
30 minutes/week.
Then add the length of time Mark spends on each activity to find the total time spent: 30 minutes/week + 60 minutes/week + 40 minutes/week = 
<gadget id="calculator">30+60+40</gadget>
<output>130</output>
130 minutes/week.

<result>130</result>