If a car travels 280 kilometers in 4 hours, how many kilometers will it travel in 5 hours at this speed?
一辆汽车4小时行280千米，照这样的速度，5小时行驶多少千米．
<gadget id="calculator">280 / 4</gadget>
<output>70</output>

<gadget id="calculator">70 * 5</gadget>
<output>350</output>

<result>350</result>