A train travels 270 miles in 3 hours. At the same rate, how many additional hours would it take to travel an additional 180 miles?
The rate is 270/3=
<gadget id="calculator">270/3</gadget>
<output>90</output>
90 mph.
Then it takes an additional 180/90=
<gadget id="calculator">180/90</gadget>
<output>2</output>
2 hours.

<result>2</result>