Every 2 miles a car drives the tires rotate 725 times.  Jeremy drives 400 miles a month.  If each tire can undergo 10,440,000 rotations how many years before the tire needs to be replaced?
Jeremy drives 400/2=
<gadget id="calculator">400/2</gadget>
<output>200</output>
200 segments of 2 miles.
That means each month the car undergoes 200*725=
<gadget id="calculator">200*725</gadget>
<output>145_000</output>
145,000 rotations.
So the tire can last for 10,440,000/145,000=
<gadget id="calculator">10440000/145000</gadget>
<output>72</output>
72 months.
That means the tires will last 72/12=
<gadget id="calculator">72/12</gadget>
<output>6</output>
6 years.

<result>6</result>