A bag of rice, A, B, and C eat together in 8 days, A eats it in 24 days, B eats it in 36 days, how many days does C eat it?
一袋米，甲、乙、丙三人一起吃，8天吃完，甲一人24天吃完，乙一人36天吃完，问丙一人几天吃完？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 24</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">1 / 36</gadget>
<output>1/36 = around 0.027778</output>

<gadget id="calculator">(1/24) + (1/36)</gadget>
<output>5/72 = around 0.069444</output>

<gadget id="calculator">(1/8) - (5/72)</gadget>
<output>1/18 = around 0.055556</output>

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

<result>18</result>