There are 4 tons of coal in the cafeteria, and 1.28 tons were burned in 8 days. At this speed, how many days can these coals be burned? What is the correct column
食堂有4吨煤，8天烧了1.28吨，照这样的速度，这些煤还可以烧多少天？正确的列式是多少
<gadget id="calculator">4 - 1.28</gadget>
<output>2.72</output>

<gadget id="calculator">1.28 / 8</gadget>
<output>0.16</output>

<gadget id="calculator">2.72 / 0.16</gadget>
<output>17</output>

<result>17</result>