The school kitchen shipped back 180kg of diesel oil, which has been burned (5/6), how many kilograms are left?
学校厨房运回180千克柴油，已经烧了(5/6)，还剩多少千克？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">180 * (1/6)</gadget>
<output>30</output>

<result>30</result>