Samuel is driving to San Francisco’s Comic-Con in his car and he needs to travel 600 miles to the hotel where he made a reservation. At first, he drives at 50 miles/hour for 3 hours straight, then he speeds up to 80 miles/hour for 4 hours. How far is he from the hotel?
At first at 50 miles/hour he travels 50 miles/hours*3 hours=
<gadget id="calculator">50*3</gadget>
<output>150</output>
150 miles.
After that, he speeds up, traveling 80 miles/hours*4 hours= 
<gadget id="calculator">80*4</gadget>
<output>320</output>
320 miles.
He travels a total of 150 miles+320 miles=
<gadget id="calculator">150+320</gadget>
<output>470</output>
470 miles.
He is 600-470=
<gadget id="calculator">600-470</gadget>
<output>130</output>
130miles from the hotel.

<result>130</result>