A pile of coal, originally planned to burn 45 tons per day, can be burned for 85 days, but actually saves 5 tons per day compared to the original plan. How many days can this ton of coal actually be burned? (answer in two ways)
一堆煤，原计划每天烧45吨，可以烧85天，实际每天比原计划节约5吨，这吨煤实际可以烧多少天？(用两种方法解答)
<gadget id="calculator">45 - 5</gadget>
<output>40</output>

<gadget id="calculator">85 / 40</gadget>
<output>17/8 = around 2.125</output>

<gadget id="calculator">45 * (17/8)</gadget>
<output>765/8 = around 95.625</output>

<result>765/8 = around 95.625</result>