A factory originally planned to burn 18 tons of coal per day, which could last for 60 days. The actual daily burning is less than the original plan (1/6), how many days can this batch of coal actually be burned? (answer in two ways)
某工厂原计划每天烧煤18吨，可以烧60天．实际每天比原计划少烧(1/6)，这批煤实际可以烧多少天？(用两种方法解答)
<gadget id="calculator">18 * 60</gadget>
<output>1_080</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">18 * (1/6)</gadget>
<output>3</output>

<gadget id="calculator">18 - 3</gadget>
<output>15</output>

<gadget id="calculator">1_080 / 15</gadget>
<output>72</output>

<result>72</result>