Rosie can run 10 miles per hour for 3 hours. After that, she runs 5 miles per hour. How many miles can she run in 7 hours?
For the first 3 hours, Rosie runs 10 miles per hour, so she runs 10*3=
<gadget id="calculator">10*3</gadget>
<output>30</output>
30 miles.
However, she still has 7-3=
<gadget id="calculator">7-3</gadget>
<output>4</output>
4 hours left to room.
For the next 4 hours, she runs 5 miles per hour, so she runs 5*4=
<gadget id="calculator">5*4</gadget>
<output>20</output>
20 miles.
In total she runs 30+20=
<gadget id="calculator">30+20</gadget>
<output>50</output>
50 miles.

<result>50</result>